the following descriptions of a number of specific and alternative embodiments are provided to understand the inventive features of the present invention . it shall be apparent to one skilled in the art , however that this invention may be practiced without such specific details . some of the details may not be described in length so as to not obscure the invention . for ease of reference , common reference numerals will be used throughout the figures when referring to same or similar features common to the figures . fig1 illustrates a schematic view of a nutrient infuser ( ni ) 100 as one embodiment of the present invention . the ni 100 is a device capable of automatically adding a plurality of consumable essential substances such as nutrients , minerals , flavorings , etc . proportionally into drinking water flowing from a drinking water source . the ni 100 is suitable for usage in a small - scale drinking water source , such as that used at home or office . the drinking water source may be a faucet , valve , bottled water dispenser , etc . the ni 100 comprises a flow meter 101 , a pump 102 , a canister 103 , a controller 104 , a coupler 105 , an attachable mean 107 and a pipe 108 . the ni 100 may further include a casing 109 that accommodates the flow meter 101 , the pump 102 , the controller 104 , and the pipe 108 . the casing 109 may be made of any material such as plastics , metals , etc . the pipe 108 is located in the ni 100 . the attachable mean 107 may be fixated to inlet and outlet of the pipe 108 . the flow meter 101 is located within the upper section of the pipe &# 39 ; s 108 sidewalls and is electrically coupled to the controller 104 . the controller 104 is externally located along the pipe &# 39 ; s 108 sidewalls and is also electrically coupled to the pump 102 . the pump 102 is also externally located along the pipe &# 39 ; s 108 sidewalls the above - described location of the pipe , the controller and the pump within the ni are only for illustrative purpose of the present embodiment and are not meant to limit the present invention in any way . the pipe , the controller and the pump of the ni can be configured within the ni in a variety of locations so as to provide same functions and purposes for the ni . still referring to fig1 , the pump 102 has an outlet 106 a and an inlet 106 b . the outlet 106 a is inserted through the sidewalls of the pipe 108 , extending into hollow space within the pipe 108 . meanwhile , the inlet 106 b is connected to the canister 103 by the coupler 105 . the coupler 105 is a quick - release coupler . the drinking water may be supplied to the drinking source from a reservoir , a water storage tank or any other known water supply . the drinking water may have been pre - treated at the water supply to eliminate contaminants , adjust ph , etc . nevertheless , it is still possible that the drinking water source may also include a filter to further eliminate contaminants etc . that may still be present in the drinking water . in one embodiment of the present invention , the ni 100 may be integrated together with the drinking water source . the ni 100 may also be attached to the drinking water source via the attachable mean 107 . the attachable mean 107 may be a pipe thread , a suction connector , or any other known connector that may removably attach the ni 100 with the drinking water source . once the ni 100 is attached to the drinking water source , the drinking water from the drinking water source may then flow through the hollow space of the pipe 108 in the ni 100 . in yet another embodiment of the present invention , the flow meter 101 is a device that may measure a flow rate , which is the rate of a fluid movement . flow rate may be measured in a variety of ways . similarly , there are a wide variety of flow meters 101 available to measure the flow rate of a fluid . the flow meter 101 is adapted in the ni 100 to measure the flow rate of the drinking water in volume per unit time . it is understood to any person skilled in the art that any type of flow meter 101 may be adapted in the ni 100 . some examples include magnetic flow meters , ultrasonic flow meters , turbine flow meters , paddle wheel meters , etc . as the drinking water flows through the pipe 108 , the flow meter 101 measures the flow rate of the drinking water . further , the flow meter 101 converts the drinking water flow rate into electronic signals and the electronic signals are transmitted to the controller 104 . the controller 104 receives the electronic signals from the flow meter 101 , processes the signals accordingly and generates another electronic signal to activate the pump 102 . thus , the electronic signals generated to activate the pump correspond to the flow rate of the drinking water through the pipe 108 . in another embodiment of the present invention , the pump 102 may be a diaphragm pump , a metering pump , or any type of pump that may be responsive to electronic signals . in a further embodiment , the pump 102 may be a piezoelectric pump that consumes very little power to operate . in a further embodiment , the controller 104 may totalize signals regarding the flow rate of the drinking water , so that when a certain volume of drinking water has flown therethrough , the controller 104 accordingly activates the pump . upon activation , the pump 102 draws the consumable substances from the canister 103 through the pump inlet 106 b and pumps the desired proportion of the consumable substances through the outlet 106 a into the drinking water flowing within the hollow space of the pipe 108 . the injection direction of the essential substances follows the flow direction of the drinking water within the pipe 108 . as such , the consumable substances are accordingly dissolved to the drinking water flowing out of the pipe 108 in the ni 100 , producing remineralized drinking water . the drinking water is now sufficiently healthy for consumption . it may be desired that the pump 102 pumps a desired amount of consumable substances into the flowing drinking water , so as to obtain a desired proportion of consumable substances - infused drinking water . therefore , the amount of consumable substances pumped correlates with the flow rate of the drinking water for example , when it is desired to get 1 ml consumable substances per 100 ml of drinking water , 1 ml of the consumable substances will be pumped into every 100 ml of drinking water , and accordingly 2 ml of the consumable substances will be pumped into 200 ml of drinking water . further , the pump 102 may be calibrated in accordance with fluid viscosity and electronic signals generated by the controller 104 . in a further embodiment of the present invention , the controller 104 may be a pcb board having several electronic components such as capacitor , resistor , any pluralities of ic chips to provide data and program storage . the controller 104 may also be electrically coupled to a user interface that may be attached externally on the casing 109 of the ni 100 . the user interface may be a liquid crystal display ( lcd ) window having plurality of keypads , a touch - screen device , and the like . in a further embodiment , the user interface can be a separate console unit that is only connected to the ni 100 when necessary . in a further embodiment , the user interface may also be a separated console unit of which being connected to the ni 100 when necessary . the user interface allows users to accordingly set the desired proportion of the consumable substances in the drinking water . the input from the user is then communicated to the controller 104 , and the controller 104 will , based on the user input and the electronic signals on the water flow rate detected from the flow meter , accordingly generate electronic signals activating the pump to pump the desired amount of consumable substances . in a further embodiment , the pump 102 may be configured to provide feedback to the controller 104 when the proportion of the consumable substances pumped is not accurate . the controller 104 may also be configured to detect other abnormalities in the ni 100 such as depleting power or consumable substances in the canister 103 , etc . the details of the occurring abnormalities may be displayed in the user interface . the user interface may further give out a warning signal such as an alarm , blinking led etc . to alert abnormalities in the ni 100 . further , the user interface is also able to display data pertaining to the quality of the drinking water , such as the ph , total dissolved solids ( tds ), conductivity , etc . as shown in fig1 , the plurality of consumable substances is stored in the canister 103 . the consumable substances may be stored in a capsule form or any other coating or shell that may be easily soluble in water . the composition or formula of the various consumable substances in one capsule may be customized accordingly . the concentration of the consumable substances may also be of a variety of concentration , etc . it is preferable that the composition and concentration of the consumable substances is complied with the recommended daily allowance ( rda ). the composition of the consumable substances may include essential minerals , such as calcium , magnesium , chloride , sodium , fluoride , potassium , selenium , iron , zinc , copper , phosphorus , iodine , sulfate , lithium , and boron , vitamins , or any other necessary substances . the composition and concentration of the consumable substances , according to one embodiment of the present invention , are summarized in table 1 below . with such composition and concentration , it is preferable to infuse 0 . 1 ml ˜ 0 . 2 ml of the consumable substances to 200 ml of drinking water . in a further embodiment , once the plurality of consumable substances in the canister 103 depletes , the entire canister 103 may be removed from the ni 100 via the coupler 105 . a new canister 103 filled with the plurality of consumable substances may then be reattached to the coupler 105 . referring again to fig1 , the coupler 105 allows the canister 103 to be easily removed from the ni 100 . likewise , the coupler 105 allows the canister 103 to be easily reattached onto the ni 100 . it is preferable that a uni - directional valve is disposed in the canister 103 . the uni - directional valve shall allow air to flow into the canister 103 , thus preventing vacuum build - up within the canister 103 caused by the operation of the pump 102 drawing the consumable substances from the canister . if vacuum , or negative pressure , is allowed to build up in the canister 103 , the pump 102 will fail to function properly that it cannot draw the consumable substances from the canister 103 . the uni - directional valve also prevents the consumable substances to flow therethrough . the consumable substances can only be drawn out from the canister by the pump 102 . in another embodiment of the present invention , the ni 100 may be operable via various power means such as an external battery source , household power source , etc . in the above embodiments , pump is used as means for pumping and injecting consumable substances to the drinking water flowing out from the drinking water source . however , the pump is not the only means that can be used to perform such functions in the ni 100 of the present invention . any other possible injectors or dispensing means can also be used herein so as to perform similar functions and serve same purpose in the ni 100 . the ni 100 may also implement fluid pressure effects such as venturi effect , etc . to draw the consumable substances from the canister 103 without requiring any power means . fig2 provides an exemplary illustration of the ni that integrated with a drinking water source 201 as another embodiment of the present invention . the drinking water source may be a faucet , valve , etc . in this embodiment , the housing 109 accommodating the pump , the flow meter , and the controller is integrated to the drinking water source 201 . the nutrient canister 103 is removably attached to the housing 109 attached to the drinking water source 201 so that when the consumable substances in the canister 103 depletes , user can promptly replace the empty canister with a new one . fig3 provides another exemplary illustration of the ni that may be removably attached to another drinking water source 301 via the attachable mean ( not shown ), as another embodiment of the present invention . in this embodiment , the housing 109 of the ni 100 is removably attached to the outlet of the water source 301 , while the nutrient canister 103 is attached to the housing of the ni . a water filter 302 comprising uf filter and activated carbon may also be attached to the housing 109 of the ni for further filtering the drinking water . in another embodiment , another type of water filter may also be used together with the ni of the present invention . fig4 provides another exemplary illustration of the ni that integrated to another drinking water source 401 as another embodiment of the present invention . this embodiment follows configuration of a counter - top water system . in this embodiment , the housing 109 accommodating the pump , the flow meter , and the controller is integrated to the drinking water source 401 . the nutrient canister 103 is removably attached to the housing 109 integrated to the drinking water source 401 so that when the consumable substances in the canister 103 depletes , user can promptly replace the empty canister with a new one . a water filter 402 , such as uf filter , reverse - osmosis filtering device and activated carbon is attached to the housing 109 integrated to the drinking water source 401 . the water filter 402 further filters the drinking water . any other type of water filter may also be used herein . the ni 100 may also be used with other drinking water supply such as water containers , water bottles etc . a water filter may also be attached between the drinking water source and the ni 100 , or integrated together with the ni 100 , to further filtrate contaminants away from the drinking water flowing through the ni 100 . the above description illustrates various embodiments of the present invention along with examples of how aspects of the present invention may be implemented . while specific embodiments have been described and illustrated it is understood that many changes modifications , variations and combinations thereof could be made to the present invention without departing from the scope of the present invention . the above examples , embodiments , instructions semantics , and drawings should not be deemed to be the only embodiments , and are presented to illustrate the flexibility and advantages of the present invention as defined by the following claims :