as shown in the drawings , the cabana 10 includes a base or pallet 11 , opposing side walls 12 and 13 , a rear wall 14 , a door 15 and a roof 16 . a combined toilet and waste material tank 17 is positioned in the cabana . each of these components will be separately described . the side walls 12 and 13 , preferably , are mirror images of each other . that is , they are made out of a single thermo - formed plastic sheet element which is symmetrically formed . therefore , they can be reversely arranged to form either a left or right side of the cabana . the side walls have a large panel face 20 which is substantially flat . preferably , rather than forming the face truly planar , it is bowed outwardly a small amount . also , the panel is formed with a series of indentations or channel - like depressions 21 which provide a decorative appearance as well as serve to rigidify the panels . the opposite corners of each side wall are bent into corner sections 22 . these sections may be angled , such as about 45 °, to the panel face 20 . the free edges of the corner sections are bent into vertical , side edge flanges 23 . these side edge flanges are approximately perpendicular to the plane of the panel face 20 so that the corresponding side edge flanges 23 at the rear of both side panels extend toward each other in substantially the same plane . likewise , the side edge flanges at the forward portion of the cabanas that is , where the door and doorway are located , also extend towards each other and are substantially in the same plane . the lower edges of the side walls 12 and 13 are each provided with a lower edge , horizontally extending flange 24 . the cabana rear wall 14 is provided with opposite side flanges or edge strip portions 25 . similarly , the upper edge of the rear wall 14 is formed with an upper flange or strip portion 26 . a lower flange or strip portion 27 is formed on the lower edge of the rear wall . the adjacent rear wall side flanges and side wall edge flanges are connected together by means of a connector strip 30 . preferably , the connector strip is formed of an extruded metal , such as aluminum , of sufficient strength and rigidity . the connector strip is formed in a squared s - shaped cross - section which provides an inner channel 31 whose inner wall is formed with a depressed , central , wall section 32 . in addition , the connector strip has an outer channel 33 . the two channels share a common wall 34 . the outer wall 35 of the outer channel is provided with a pair of integral , rearwardly opening rear or bumper channels 36 . preferably , the free edges of the walls forming the bumper channels are provided with a hook - like configuration 37 . the connector strips extend along the sides of the rear panel 14 . in addition , connector strip portion 38 extends along the upper edge of the rear panel , as illustrated in fig5 . in the preferred embodiment illustrated in fig8 the side edge flange 23 and the rear wall side flange or strip 25 are arranged in substantially the same plane , but are actually offset slightly one from the other . thus , the flange 25 overlaps the flange 23 . as shown in fig7 the flange 25 slips into the outer channel 33 of the connector strip 30 . the side wall edge flange 23 slips into the inner channel 31 of the connector strip 30 . the channels 31 and 33 are deeper than the anticipated lengths of the flanges 25 and 23 that fit within them . thus , as illustrated in fig6 the flanges 23 and 25 do not fill their respective channels but rather are spaced from the bottoms of these channels . consequently , considerable room is allowed to accommodate for inaccuracies in the dimensions of the side walls and rear wall of the cabana . that is , the depth of entry of the flanges into the respective channel can be adjusted to obtain the desired overall width dimension of the cabana . moreover , the free edges of the flanges need not be carefully trimmed or squared . this substantially reduces the amount of labor that might otherwise be required for that purpose . once the flanges 23 and 25 are inserted and frictionally held within their respective channels 31 and 33 , rivets 39 may be applied to fix the parts together . ( see fig6 .) the connector strip is covered with a bumper strip 40 . the bumper strip is made of a resilient plastic material , which is rubber - like in characteristics , and is generally u - shaped in cross - section . the bumper strip 40 is shown in assembled position , in fig6 and 12 . fig1 illustrates the bumper strip in position ready to be applied upon the connector strip . the bumper strip 40 is held in place by integral prongs or tongues 41 , that are arrow - head shaped , which fit into the bumper channels 36 on the connector strip 30 . the arrow head prongs tend to interlock with the hooked ends 37 of the bumper channels to prevent removal of the bumper strip once they are inserted . the bumper strip is arranged to extend around and to cover the exposed portions of the connector strip . thus , one of its purposes is to enhance the appearance of the rear of the cabana . another purpose is to provide a resilient bumper to protect the cabana against damage due to impacts which occur during the transportation of the cabana to and from its sites of use . normally , these cabanas are transported from one site to another , upon trucks . when a number of cabanas are carried upon a truck , there is a tendency for them to strike each other during the jolting of the truck . thus , the bumper strips prevent damage . the bumper strips 40 may include grooves 43 or indentation stripes . these grooves or stripes enhance the appearance of the bumper strips and also , may increase the resilient movement of the portions of the bumper strips that sustain impacts . as illustrated in fig1 , the cover or roof 16 of the cabana is provided with a rear , downwardly extended , flange 44 . this flange fits into the inner channel 31 of the horizontal upper portion 38 of the connector strip . the upper flange 26 of the rear panel fits into the outer channel 33 of the horizontal part 38 of the connector strip ( see fig1 ). fig9 and 10 illustrate a modified form of connector strip . this strip 45 is generally h - shaped in cross - section and is made of a suitable metal extrusion , such as aluminum , of sufficient strength for the purpose . here , the strip is provided with opposed channels 45 into which the aligned flanges 23 a and 24 a of the respective side and rear walls are inserted . fig1 shows the flanges arranged in a common plane rather than being slightly offset from the same plane as illustrated in fig7 and 8 . as illustrated in the drawings , the channels 46 are deeper than the portions of the flanges inserted into them so as to allow for variations in dimensions of the wall portions . suitable rivets ( not shown ) may be used to fix the flanges within the channels . turning to the front of the cabana , the space between the opposed side wall flanges provides a doorway . the doorway is defined or outlined by a doorway strip 50 . this strip is preferably formed of a metal extrusion , such as aluminum , which , as shown in fig1 , is t - shaped in cross - section to provide a head 51 and a stem 52 . one side of the head provides a door stop flange 53 . the other side of the head , along with an integral second flange 54 , forms a channel 55 . this channel receives the side wall forward flanges 23 ( see fig1 ). in addition , the stem part of the extruded strip is bent into a j - shaped cross - section to provide a water drain channel 56 . the doorway - defining strip is arranged to provide jamb portions 57 and a header portion 58 along the sides and top of the doorway . in addition , a sill strip 59 is fastened to the lower ends of the jamb portions 57 . the sill strip may be of the same cross - section as the doorway strip or may simply be a metal strip which is flat or is angled , in cross - section . thus , the strip 50 provides a doorway outline or frame . the door 15 , may be provided with an edge flange portion 60 . a suitable gasket or padding strip ( not shown ) may be arranged around the edges of the door . also , the door may be formed of a pair of overlapped panels , joined together at their edges to provide a rigid door panel ( not shown ). the door is provided with hinges 61 for connecting it to one of the jamb forming members 57 . in addition , a latch mechanism 62 ( shown schematically ) may be mounted upon the door for closing and locking the door when the cabana is in use . the roof 16 is provided with a front edge flange 63 which is fitted within the channel 55 of the header portion 58 of the doorway defining strip 50 . ( see fig1 .) rivets or the like may be used to secure the parts together . the cabana base 11 , preferably , is in the form of a pallet frame 65 . the pallet frame may be molded of a suitable , strong , durable , plastic material and is hollow ( see , for example , fig1 ). as illustrated in fig5 the base or pallet frame is preferably formed with a rear socket forming opening 66 and forward supports or struts 67 . integral skids or skid portions 68 are formed on the sides and lower surface of the base or pallet . these skids may have their lower surfaces provided with a series of beads or ribs 69 and 69 a ( see fig1 ). between the beads 69 a , a plastic skid strip insert 70 may be positioned and fastened in place with suitable screws ( not shown ) so that the cabana unit may be slid upon the ground or upon a support surface . thus , wear on the bottoms of the pallets of such cabanas is taken by the inserts and , in the event of undue wear or damage , the worn inserts 70 may be removed and replaced with new inserts . the cabana is primarily designed as a housing for an outdoor toilet . thus , as shown in fig5 a static waste - receiving toilet tank 17 is arranged upon the base or pallet 11 over the rear open socket portion . the lower portion of the tank may be extended downwardly to form a flat , pan - like portion 71 that fits within the open socket portion 66 to thereby stabilize the tank in position . a toilet opening 72 is provided on the upper surface of the toilet tank . a toilet seat and cover unit 73 is positioned over the toilet opening . the forward portion of the pallet is covered with a rigid floor panel 74 which may be formed of plywood or sheet plastic or the like to provide a floor upon which an occupant may stand . the lower edge flanges 24 of the side walls of the cabana are fastened , such as by rivets 75 or screws or the like , to the sides , along side notches 76 formed on the base frame ( see fig1 ). the upper edges of the side walls are cut out to form depressions or elongated slots 80 which may provide ventilation openings beneath the sides of the overlapping roof . the roof may be formed with integral box - like side edge sections 81 which overlap enlargements 82 formed on the upper edges of the side walls . the roof edge sections may be fastened to the enlargements by suitable rivets or the like ( not shown ). in addition , the cabana may include a sink unit 85 of suitable design . this includes a sink or washing bowl 86 which may be mounted upon a support that can be used as a water tank 87 ( see fig5 ). a suitable water pump , such as a manually operated pump , can be installed for pumping water to the sink from the water tank . alternative arrangements of the toilet and the sink units within the cabana may be used . thus , the drawings and the disclosure herein illustrate one embodiment of this arrangement . the combined toilet and waste material tank 17 , in more detail , is formed with opposed side walls 90 and 91 and a rear wall 92 . the side walls are preferably bowed or curved somewhat to closely match the interior surfaces of the cabana walls 12 and 13 . in addition , the upper edges of the side and rear walls of the tank are formed with a notch 93 which receives a rubber - like gasket strip 94 . the gasket seals the tank to the adjacent areas of the cabana walls ( see fig1 and 19 ). the bottom panel 95 of the tank ( see fig1 ) is formed with the depressed , shallow , flat pan - like portion 71 , mentioned previously . thus , the area of the bottom which surrounds the pan - like depression , provides a ledge which rests upon the upper surface of the portions of the base which define the open socket 66 of the base . this is shown schematically in fig1 . the tank is closed with an upper , closure panel 96 which has a depressed portion 97 integrally connected to the main body of the upper panel by an integral flange - like strip 98 . in addition , the tank has a front wall 99 having a middle portion 100 which is angled relative to opposite side portions 101 and 102 of the front wall 99 . the toilet 72 has a forward , partial bowl - like portion 105 which extends forwardly of the middle portion 100 of the front wall . as shown in fig1 and 20 , the cabana has a front to rear central axis 106 which bisects the cabana into two opposite sides . similarly , the tank has a corresponding central axis 107 which is in alignment with the cabana axis 106 . the toilet , however , has a central axis 108 ( see fig1 ) which is angled to intersect the central cabana and tank axes 106 and 107 at an acute angle . the middle section 100 of the front wall is approximately perpendicular to the axis 108 of the toilet so that it is angled relative to the axes 106 and 107 . thus , the forward - most portion of the bowl - like portion of the toilet is roughly in the plane of the side portions 101 and 102 of the front wall 99 of the tank . the distances from the forward - most point of the bowl - like portion of the toilet to the surface of the middle wall section 100 , are approximately equal on both sides of the toilet . the toilet seat - cover unit 73 may be formed of a conventional toilet seat 110 and a suitable , correspondingly shaped and sized cover or lid 111 . the cover and lid are connected together and to the tank by conventional hinges 112 . thus , for use , the toilet lid 111 may be swung upwardly , as illustrated in fig1 , to expose the seat 110 . the partial bowl - like extension of the toilet , extending forwardly and spaced on either of its sides approximately equidistantly from the front wall section with which it is joined , makes the toilet more user friendly for both males and females . this arrangement makes it possible to eliminate a separate urinal which would otherwise be conventionally mounted within the cabana . hence , the toilet arrangement is intended to be unisex and is convenient and comfortable for use by either gender . the tank may be periodically cleaned by inserting the end of a pipe through the toilet opening into the tank and connecting the opposite end of the pipe to a waste removal truck for pumping out the contents of the tank . this is a conventional system for cleaning toilets of this type . when the cabana , whether fully assembled or in a disassembled or knockdown form , is to be transported from one site to another or is to be stored , the waste tank may be removed and bundled together with other waste tanks as shown in fig2 and 21 . with the toilet offset to one side of the central axis of the tank and the angled arrangements of the toilet and the middle portion of the front wall , a pair of tanks may be positioned in front face to front face arrangement . the forward extending partial bowl - like portions of each of the toilets nest within the deepest portions of the angled opposing front wall middle section . hence , the two tanks reduce the space required for storage or shipping and , tend to strengthen each other against impacts . for this purpose , conventional shipping straps ( not shown ) may be wrapped around the tanks to hold them together . two separate pairs of tanks may be shipped together as a single unit by stacking one pair upon the other , as illustrated in fig2 . thus , the lower surface of the pan - like lower extension 71 of each of the upper pairs of tanks rest upon the upper surface of the pair of tanks beneath them . all of the tanks may then be secured together with conventional wrapping straps . as can be seen , the components forming the cabana are relatively simple in construction and the system for securing the components together is able to accommodate relatively wide discrepancies in dimensions or finishings of the edges of the wall and door components while still providing a strong , rigid and attractive cabana unit . moreover , the components are so formed and so fastened together that they may be individually replaced in the event any one or more of the components are damaged during the transportation or use of the unit . further , the toilet and tank units can be easily transported and replaced when necessary . this invention may be further developed within the scope of the following claims . thus , having fully described at least one operative embodiment of this invention ,