in the following description , various embodiments of the present invention will be described . for purpose of explanation , specific configurations and details are set forth in order to provide a thorough understanding of the embodiments . however , it will also be apparent to one skilled in the art that the present invention may be practiced without the specific details . furthermore , well - known features may be omitted or simplified in order not to obscure the embodiment being described . in fig1 depicts a perspective view of the pressurize - able dispenser pack for hot or cold liquids or food in accordance with the present invention . the dispenser pack consists of an outer insulation jacket 10 . the outer insulating jacket 10 could be made of ballistic nylon , pe foam or other flexible materials with good insulation and elastic properties . the reusable jacket 10 is constructed to allow the building up of pressure for the pressurized release of the enclosed heated liquid when the dispenser is activated . a strap tote device 11 may be affixed on top of the jacket 10 to facilitate the carrying of heavy quantities of liquids or foodstuff . an accessory pocket 12 may likewise be affixed to the outside of jacket 10 for holding cups , heating chemicals , dispenser attachments etc . on the side of jacket 10 is a zipper 13 when opened allows access to the inside chamber of the jacket 10 that holds the inner bladders ( not shown in fig1 ). similarly on the top side of jacket 10 is a zipper 14 . when zipper 14 is opened , the inside chamber of the jacket 10 that holds the inner bladders are accessible . extending perpendicularly out from jacket 10 is a threaded port 23 . port 23 is “ leak - proof ” bonded to the wall of bladder 20 ( not shown in fig1 , shown in fig2 ). after the initial insertion of the heater element into the inside heating bladder 20 , port 23 is an entry way by which water or reagent is poured into the inside reaction bladder 20 to initiate the exothermic chemical reaction for heating . once the chemical reaction has started , a cap 24 is secured onto port 23 to contain the chemical reaction generating both heat and pressure . also extending from the inside heater bladder 20 ( not shown in fig1 ) and out of the jacket 10 is the over - pressure valve 22 . valve 22 would release any excess pressure formed during the exothermic reaction to prevent the dispenser pack from rupturing . lastly , extending perpendicularly out from the innermost product bladder 40 ( not shown in fig1 , shown in fig2 ) and out of the jacket 10 is the threaded product dispenser port 41 . port 41 is “ leak - proof ” bonded to the walls of the bladders 20 and 40 . for dispensing hot water or hot liquid products , a liquid dispenser attachment 42 is used . the dispenser attachment 42 would be affixed onto the product dispenser port 41 . in fig2 , the inside heater bladder 20 and the innermost liquid or product bladder 40 are described in greater detail . as shown , the inner bladder 20 and the innermost bladder 30 are in a “ bladder - in - bladder ” configuration . the inside heater bladder 20 is formed from heavy duty reusable flexible thermal plastics , with a side opening 26 and a top opening 28 . when the zipper 13 is unzipped and the opening 26 is opened , the chemical heater element 31 ( not shown in fig2 , shown in fig3 ) would be inserted into the heater bladder 20 . a plastic rib 25 is affixed across the opening 26 and a hook and loop strap 27 is affixed on bladder 20 . when the opening 26 is folded across the plastic rib 25 and then rolled closed and secured in place by hook and loop straps 27 , a water and gas tight seal is formed across the opening 26 . the plastic rib 25 and hook and loop straps 27 constitute a sealing means for sealing the opening 26 . similarly an opening 28 is formed on the top side of bladder 20 . likewise a plastic rib 29 is affixed across the opening 28 . the plastic rib 29 and hook and loop straps 30 constitute a sealing means for sealing the opening 28 . the opening 28 allows the placement of the innermost product bladder 40 into bladder 20 . the combination of bladder 20 and bladder 40 constitute the “ bladder - in - bladder ” configuration . extending perpendicularly from the wall of the heater bladder 20 are the threaded ports 21 and 23 . affixed to port 21 is the over - pressure valve 22 ( shown in fig1 ). valve 22 prevents excess pressure from building up that may rupture the dispenser pack . when the cap 24 ( shown in fig1 ) is removed off of port 23 , water or other chemical reagents can be poured into the heater bladder 20 through the opening for the initiation of the heating reaction . the innermost bladder 40 is positioned inside the heater bladder 20 through the opening 28 . for multiple usages , the liquid or product bladder 40 is formed from heavy duty reusable flexible thermal plastics with a top opening 43 . liquids or products to be heated would be placed into the product bladder 40 through the opening 43 . a plastic rib 44 is affixed across the opening 43 . when the opening 43 is folded across the plastic rib 44 and then secured by hook and loop straps 30 , any water or product inside of bladder 40 would be sealed for heating . a threaded port 41 would be affixed to the innermost bladder 40 . the port 4 land bladder 40 are “ leak - proof ” bonded together . the port 41 would extend through the side wall of the inner heater bladder 20 . heated liquids or products would exit through this port 41 . the above “ bladder - in - bladder ” configuration is ideally suited for the multiple heating and dispensing of large quantities of water in the field . prior to heating , water and the heater element 31 ( shown in fig3 ) would be inserted . after use , this configuration of bladders allows the easy removal of bladder 40 from bladder 20 for cleaning . fig3 shows the process of inserting the chemical heater element 31 . chemical heater element 31 can be mgfe alloy material or other similar exothermic chemicals . for ease of handling , element 31 made be in the form of a pad or wafer . prior to heating the enclosed liquids or products , the insulation jacket zipper 13 would be first unzipped . the hook and loop straps 27 ( shown in fig2 ) would be unfastened and the opening 26 can be unrolled and opened . through the opening 26 , fresh or used chemical heater pads would be inserted or removed . the procedure would be reverse to close up the bladder 20 for each heating cycle . fig4 shows another embodiment of the present invention . for prepackaged liquids or food products , the innermost product bladder 40 would be a sealed bladder with a threaded port fitment 45 . the bladder 40 will no longer have a top opening 43 . likewise bladder 40 would not need a plastic rib 44 . liquid or food product would be sealed inside . the only attachment to bladder 40 is the port fitment 45 . port 45 is “ leak - proof ” bonded perpendicular to the side wall of bladder 40 . the innermost bladder 40 may be formed from less expensive one - time use plastics . prior to heating the enclosed liquids or products , the insulation jacket zipper 13 would be first unzipped . the hook and loop strap 27 would be unfastened and opening 26 can be unrolled and unfolded through the opening 26 ( shown in fig5 ), the prepackaged product bladder 40 would be inserted ; and , after use removed . the port fitment 45 would extend out of the jacket 10 through the port 41 ; whereby the dispenser fitment 42 would be affixed to port 41 . once the product been consumed , the spent bladder 40 would be removed for disposal through the reversal of the above procedure . in fig5 , the inside heater bladder 20 and the innermost prepackaged liquid or product bladder 40 for the second embodiment of the present invention is described in greater detail . the inside heater bladder 20 is again constructed from heavy duty reusable flexible thermal plastics , with a side opening 26 . bladder 20 no longer has the top opening 28 ( shown in fig2 ). when the zipper 13 is unlocked and the opening 26 is exposed , the chemical heater element 31 ( shown in fig3 ) would be inserted into the inside bladder 20 . a plastic rib 25 is affixed across the opening 26 and a hook and loop strap 27 is affixed on bladder 20 . when the opening 26 is folded across the plastic rib 25 and then attached onto the strap 27 , a water and gas tight seal is formed across the opening 26 . the plastic rib 25 and hook and loop 27 constitute a sealing means for closing the opening 26 . extending perpendicularly from the wall of the heater bladder 20 are the threaded ports 21 and 23 ( shown in fig4 ). the ports 21 and 23 are “ leak - proof ” bonded perpendicularly to the side wall of the heater bladder 20 . affixed to port 21 is the over - pressure valve 22 ( shown in fig4 ). valve 22 prevents excess pressure from building up that may rupture the dispenser unit . when the cap 24 ( shown in fig4 ) is removed off of port 23 , water or other chemical reagents can be poured into the heater bladder 20 through the opening for the initiation of the heating process . fig6 depicts a method by which the present invention can supply hot shower water . a tube 51 is attached to a threaded port fitment 52 at one end and a shower head 50 at the other end . fitment 52 is affixed to the dispenser port 41 ( shown in fig1 ). when activated , the pressure and heat of reaction would provide ample fast running hot water for showers . the dispenser pack could be hung via the strap 11 ( shown in fig1 ) to provide added water pressure for a more comfortable shower . fig7 describes a method by which the present invention can be used to brew hot coffee or espresso . a tube 51 is attached to a threaded port fitment 52 at one end and a coffee or espresso filter head 53 at the other end . fitment 52 is affixed to the dispenser port 41 ( shown in fig1 ). when activated , the pressure and heat of reaction would provide ample hot pressurized water for brewing coffee or espresso . an alternatively , the coffee or espresso filter head 53 can be directly attached onto the threaded dispenser port 41 without connecting to an intermediate tube 51 . the dispenser unit could be hung via the strap 11 ( shown in fig1 ) to provide added water pressure as needed .
a reusable , pressurize - able , foldable and flexible dispenser pack for hot or cold liquids or food is described as consisting an insulation jacket , an enclosed chemical bladder and an innermost product bladder . the chemical bladder contains exothermic material when activated would produce heat and pressure . the chemical and product bladders are formed to be easily accessible to the insides of the bladders for refilling chemicals and products , respectively . when used specifically for heating water , the dispenser pack can be fitted with a shower head for showering ; or a coffee / espresso filter bead for making fresh brewed coffee or espresso .