as discussed above , embodiments of the present invention relate to a portable beverage containment device and more particularly to an otg ( on the go ) specialty multi - beverage container system as used to improve the convenience of mixing and transporting a variety of powder - based beverages for consumption during a time period . referring to the drawings by numerals of reference there is shown in fig1 a and 1b , perspective views illustrating multi - beverage container and mixing system 100 in an in - use condition 190 and container housing 110 , respectively according to an embodiment of the present invention . multi - beverage container and mixing system 100 preferably comprises : container housing 110 having at least one isolated inner volume 111 ( or a plurality in alternate embodiments ); and lid 120 . lid 120 preferably houses a plurality of compartment ( s ) 130 ( in the present embodiment three compartment ( s ) 130 are shown however in alternate embodiments more or less compartment ( s ) 130 may be used ) and at least one drink access spout 125 . in the present version , lid 120 is coupleable to container housing 110 , thereby defining a cylinder that is hand - holdable . lid 120 is preferably coupleable to container housing 110 with such means as screw threads , snaps , suction means , etc . those with ordinary skill in the art will now appreciate that upon reading this specification and by their understanding the art of coupling and / or fastening as described herein , methods of coupling and / or fastening two objects together to create one functioning unit will be understood by those knowledgeable in such art . within this particular embodiment shown , each compartment 130 may have at least one internal door 140 and at least one external door 150 . external door ( s ) 150 may allow at least one user to fill at least one compartment ( s ) 130 with at least one beverage mix 165 , while internal door ( s ) 140 may allow the beverage mix 165 contained in compartment 130 to be released into water 160 confined in container housing 110 . when internal door ( s ) 140 are activated , fluid communication is permitted between compartment ( s ) 130 of lid 120 and inner volume 111 of container housing 110 , whereby beverage mix ( es ) 165 and water 160 may be combined . within this particular embodiment , inner volume 111 may be defined by the walls of container housing 110 and internal door ( s ) 140 . internal door 140 preferably comprises at least one set of positive and negative magnet 145 insets ( or suitable equivalent securing / opening and closing means ) which may be used to temporarily lock internal door 140 in a closed position against container housing 110 . a user depressible button 147 may trigger the positive and negative magnet ( s ) 145 to repel one from the other , thereby releasing internal door 140 from its attachment to container housing 110 and positioning internal door 140 in an open position . a user releasing button 147 may realign magnet ( s ) 145 to an attractive state , thereby drawing internal door 140 to a closed position once again against container housing 110 . those with ordinary skill in the art will now appreciate that upon reading this specification and by their understanding the art of magnetism as described herein , methods of manipulating polarity of magnets to facilitate the movement of attached members will be understood by those knowledgeable in such art . multi - beverage container and mixing system 100 of the present invention allows a user to separately carry and mix beverage mix ( es ) 165 with water 160 in order to create different beverages at desired intervals throughout the day . a user may access and consume a beverage mixed in such a way through drink access spout 125 . drink access spout 125 may have access to one or more inner volume ( s ) 111 and may be movable in certain embodiments between inner volume ( s ) 111 . drink access spout 125 in the present embodiment may comprise plug 126 used to prevent the contents of inner volume 111 from leaking or spilling from multi - beverage container and mixing system 100 . plug 126 may be sized to fit within drink access spout 125 to act as a stopper or may be sized to enclose drink access spout 125 to act as a cap . drink access spout 125 may be rotatably opened . referring now to fig2 , a perspective view illustrating multi - beverage container and mixing system 100 with external doors 150 , buttons 147 , and volume measurement indicia markings 115 shown according to an embodiment of the present invention of fig1 a and 1b . multi - beverage container and mixing system 100 preferably comprises at least one volume measurement indicia marking 115 denoted , in the present embodiment , preferably along the vertical axis upon the outside wall of container housing 110 , affixed preferably with a permanent means such as etching , embossing , screen - printing , or via other equivalent means . in preferred embodiments , the interior wall of container housing 110 preferably comprises extruding mix - ridge ( s ) 112 for the thorough mixing of beverage mix ( es ) 165 with water 160 when multi - beverage container system 100 is shaken . located at intervals around lid 120 , in the preferred embodiment , is at least one compressible button 147 correlated to each internal door 140 , whereby button 147 may activate the release of the correlating internal door 140 with which it is associated , causing beverage mix ( es ) 165 to fall into water 160 contained within inner volume 111 . button 147 may comprise a toggle switch , twistable knob , or the like . fig3 shows a perspective view illustrating multi - beverage container and mixing system 100 with internal doors 140 , magnets 145 , thermal insulation means ( hereby embodying thermal insulator 117 ), and mix - ridges 112 shown according to an embodiment of the present invention of fig1 a and 2 . the present figure illustrates multi - beverage container and mixing system 100 as a vessel in which beverage mix ( es ) 165 ( comprising powder used in combination with water 160 ) may be used to create a sport drink or a non - sport drink , depending on the type of powder . upon reading this specification , it should be appreciated that , under appropriate circumstances , considering such issues as user preferences , design preference , structural requirements , marketing preferences , cost , available materials , technological advances , etc ., other ( cold or hot — when mixed ) powdered drinks such as , for example , health drinks , children &# 39 ; s drinks such as kool - aid ®, lemonade , iced - tea , coffee , tea , drinks for babies , etc ., may be sufficient . container housing 110 and lid 120 preferably comprise a sealable containment assembly 180 to accommodate the sport or non - sport beverage . thus connected , sealable containment assembly 180 may comprise thermal insulator 117 ; wherein thermal insulator 117 effectively ensures water 160 and / or mixed drink accommodated in inner volume 111 may be kept at a lower or elevated temperature , based on user - preference , over an extended duration . referring now to fig4 , an exploded view illustrating a sealable containment assembly 180 including portable beverage container 102 ( container housing 110 ) and lid 120 of multi - beverage container and mixing system 100 according to an embodiment of the present invention of fig1 a - 3 . in preferred embodiments , sealable containment assembly 180 may be dismantled into individual components : container housing 110 and lid 120 . sealable containment assembly 180 may thus be stored as a single portable beverage container 102 or as separate components : container housing 110 and lid 120 . when separated , container housing 110 and lid 120 may be cleaned between uses . preferably designed to withstand dropping and other impacts , container housing 110 and lid 120 may be constructed of resilient light - weight material , such as plastic or the like . this material is able to withstand the heat of conventional dishwashing machines , thus making the container housing 110 , lid 120 , and their various components “ dishwasher safe ”, and cost - efficient to maintain . additionally , a preferred material for constructing container housing 110 may be translucent . the material used in constructing lid 120 may be translucent or opaque , based on the manufacturer &# 39 ; s or user &# 39 ; s preference . those with ordinary skill in the art will now appreciate that upon reading this specification and by their understanding the art of materials as described herein , methods of production and materials for use in container making will be understood by those knowledgeable in such art . multi - beverage container and mixing system 100 may be sold as kit 440 comprising the following parts : at least one container housing 110 ; at least one lid 120 ; and at least one set of user instructions . kit 440 may be sold in combination with or as a promotional item with beverage mix ( es ) 165 . multi - beverage container and mixing system 100 may be manufactured and provided for sale in a wide variety of sizes and shapes for a wide assortment of applications . upon reading this specification , it should be appreciated that , under appropriate circumstances , considering such issues as design preference , user preferences , marketing preferences , cost , structural requirements , available materials , technological advances , etc ., other kit contents or arrangements such as , for example , including more or less components , customized parts , different color combinations , parts may be sold separately , etc ., may be sufficient . fig5 is a flowchart 450 illustrating a method of use 400 for the multi - beverage container and mixing system 100 according to an embodiment of the present invention of fig1 a - 4 . a method of using ( at least hereby enabling method of use 400 ) a multi - beverage container and mixing system 100 preferably comprising the steps of : step one 401 pouring water 160 into at least one inner volume 111 of a container housing 110 through an external door 150 and / or internal door 140 ( or through a spout or by removing lid 120 to access ) into a / the desired inner volume 111 ; step two 402 closing at least one internal door 140 ; step three 403 placing at least one powdered beverage mix 165 inside at least one compartment 130 of lid 120 through an external door 150 ; step four 404 closing external door 150 ; and step five 405 transporting powdered beverage mix ( es ) 165 and water 160 in an unmixed state . the method of use 400 preferably further comprises the steps of : step six 406 activating internal door 140 via a push - button 147 ; and step seven 407 mixing powdered beverage mix 165 from at least one compartment 130 of lid 120 with water 160 in inner volume 111 of container housing 110 at a user - preferred interval , yet not mixing other powdered beverage mix ( es ) 165 stored in other compartment ( s ) 130 of lid 120 , allowing beverage mix ( es ) 165 to be mixed independently with water 160 in designated inner volume 111 at later interval ( s ) ( or by rinsing and re - filling water 160 if in a single inner volume 111 ). it should be noted that step 405 is an optional step and may not be implemented in all cases . optional steps of method 400 are illustrated using dotted lines in fig5 so as to distinguish them from the other steps of method 400 . it should be noted that the steps described in the method of use can be carried out in many different orders according to user preference . upon reading this specification , it should be appreciated that , under appropriate circumstances , considering such issues as design preference , user preferences , marketing preferences , cost , structural requirements , available materials , technological advances , etc ., other methods of use arrangements such as , for example , different orders within above - mentioned list , elimination or addition of certain steps , including or excluding certain maintenance steps , etc ., may be sufficient . the embodiments of the invention described herein are exemplary and numerous modifications , variations and rearrangements can be readily envisioned to achieve substantially equivalent results , all of which are intended to be embraced within the spirit and scope of the invention . further , the purpose of the foregoing abstract is to enable the u . s . patent and trademark office and the public generally , and especially the scientist , engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology , to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application .