in accordance with the present invention , personal hydration pack 10 includes a reservoir 20 which is pre - filled with a beverage concentrate and is sealed in a tamper - evident manner . pre - filling reservoir 20 with a beverage concentrate prior to sealing in a tamper - evident manner allows the user to fill reservoir 20 from any drinking water source and therefore also eliminates waste containers such as plastic bottles in which the user would otherwise have purchased a beverage with which to fill reservoir 20 . in addition , making pre - filled reservoirs such as reservoir 20 available to end - users encourages such end - users to purchase new reservoirs rather than risk build - up of mold and / or fungus in improperly cleaned , used reservoirs . reservoir 20 is positioned within personal hydration pack 10 as shown with personal hydration pack 10 shown cut - away . personal hydration pack 10 includes two holes 12 a - b through which drinking hose 22 of reservoir 20 can pass for drinking by a user during any of a number of physical activities such as hiking , cycling , skating , rowing , etc . in this illustrative embodiment , hose 22 terminates at a bite valve 24 which the user can bite to facilitate flow of a beverage contained within reservoir 20 . reservoir 20 is shown in isolation in fig2 . reservoir 20 is pre - filled with a beverage concentrate such as a sports drink concentrate in powder or alternatively liquid form and is a plastic bag which is sealed by being welded about its perimeter with the beverage enclosed . reservoir 20 includes a hose fitting 24 which is welded to reservoir 20 and to drinking hose 22 to form a permanent seal between reservoir 20 and drinking hose 22 . in an alternative embodiment , hose fitting 24 is replaced with an angled hose fitting 26 ( fig4 ). in another alternative embodiment , hose fitting 24 is replaced with an exit valve described in u . s . pat . no . 5 , 727 , 714 to fawcett and that description is incorporated herein by reference . drinking hose 22 is welded to form a seal at proximal end 28 . in one embodiment , reservoir 20 is welded around its perimeter and drinking hose 22 is fixed to reservoir 20 by hose fitting 24 prior to filling of reservoir 20 with a beverage . the beverage is then sealed within reservoir 20 by welding proximal end 28 of drinking hose 22 . in an alternative embodiment , proximal end 28 of drinking hose 22 is sealed and drinking hose 22 is affixed to reservoir 20 in the manner described herein and a majority of the perimeter of reservoir 20 is welded prior to filling reservoir 22 with a beverage concentrate . after filling , the remainder of the perimeter of reservoir 20 is welded to seal in the beverage . in one illustrative example embodiment , the materials and techniques used are those described in the following u . s . patents which are incorporated herein by reference : inventor ( s ) u . s . pat . no . issue date l . doyen et al . 3 , 192 , 095 jun . 29 , 1965 boquet & amp ; doyen 4 , 023 , 700 may 17 , 1977 aquetant & amp ; doyen 4 , 010 , 786 mar . 8 , 1977 doyen & amp ; doyen 3 , 935 , 993 feb . 3 , 1976 doyen & amp ; doyen 3 , 637 , 133 feb . 25 , 1972 doyen 3 , 583 , 132 jun . 8 , 1971 doyen 3 , 514 , 061 may 26 , 1970 doyen et al . 3 , 380 , 646 apr . 30 , 1968 in either embodiment , the user adapts reservoir 20 for drinking by cutting off the welded portion of proximal end 28 , filling reservoir 20 with water to mix with the concentrate , and affixing bite valve 24 to the now - open proximal end 28 of drinking hose 22 . thus , cutting of proximal end 28 of drinking hose 22 evidences a break of the seal of reservoir 20 . such is important in that tamper - evident sealing of reservoir 20 enables retail sale of reservoir 20 pre - filled with a beverage . sealing reservoir 20 with the beverage concentrate therein is a significant improvement over an alternative in which an unsealed reservoir pre - filled with concentrate is sealed within additional packaging . not only does the sealed additional packaging represent unnecessary cost and wasted materials , but the sealed additional packaging hides the included reservoir and bite valve from the consumer , thereby making evaluation of the reservoir and concentrate combination difficult to evaluate for purchase . an alternative embodiment is shown in fig5 . reservoir 30 includes two sealed , tamper - evident access ports 32 and 34 . each of ports 32 and 34 can be of the form illustrated in fig6 . for illustration purposes , port 32 is described in the context of fig6 but it should be appreciated that description of port 32 in conjunction with fig6 is equally applicable to port 34 . port 32 is welded to reservoir 30 and has a threaded exterior annular surface which mates with a threaded cap 36 . port 32 is sealed by a user - removable seal 38 which , in this illustrative embodiment , is a ring - pull seal such as those used on conventional and currently available milk and juice cartons and which can be easily removed by a user without tools by simply pulling on a ring 38 r after removing cap 36 . the user attaches drinking hose 22 by screwing a hose fitting cap 40 onto port 32 . hose fitting cap 40 is sealed to drinking hose 22 as shown . port 34 is provided as an alternative port for re - filling reservoir 30 after consumption of the beverage previously made from water and the beverage concentrate pre - filled into reservoir 30 if the user so desires . port 34 is also sealed and tamper - evident after initial filling . unlike with reservoir 20 described above , drinking hose 22 can be preserved and reused with multiple instances of reservoir 30 . alternatives to port 32 which are similarly sealed and tamper - evident are shown in fig7 - 9 . in all such embodiments , reservoir is formed completely , including ports 32 and 34 or alternatives thereof , and is welded around a majority of the perimeter of reservoir 30 . reservoir 30 is then filled with a beverage concentrate and the remainder of the perimeter of reservoir 30 is sealed to completely seal in the beverage in such a manner that accessing the beverage concentrate , e . g ., to add water , requires breaking the seal of reservoir 30 in a clearly evident manner . it should be appreciated that reservoir 20 is preferably pre - filled with an amount of concentrate which is predetermined to be the proper amount for mixing with an amount of water equal to the liquid capacity of reservoir 20 . for example , if reservoir 20 can hold one liter of liquid , it is preferred that reservoir 20 is pre - filled with an amount of beverage concentrate which is proper for mixing with one liter of water . fig7 shows port 42 which is an alternative to port 32 . port 42 is welded to reservoir 30 in a conventional manner . however , reservoir 30 includes a thin sealing membrane 46 which can be punctured by the user using a sharp instrument 44 , such as an ice pick . in some embodiments , a suitable sharp instrument made inexpensively of hard plastic can be distributed with reservoir 30 . in the embodiment shown in fig7 , a drinking hose 50 which is generally analogous to drinking hose 22 includes a soft rubber barbed distal end 48 for inserting into port 42 . barbed distal end 48 facilitates insertion into port 42 and sealing with port 42 and resists inadvertent extraction of barbed distal end 48 from port 42 . the user accesses the beverage concentrate sealed in reservoir 30 through port 42 by ( i ) piercing seal membrane 46 with sharp instrument 44 and ( ii ) inserting barbed distal end 48 into port 42 . the user can then fill reservoir 30 through drinking hose 50 or , alternatively , through port 34 . fig8 shows an alternative embodiment in which an angled port 52 is welded to reservoir 30 . angled port 52 includes a barbed end 54 over which drinking hose 22 can be placed . barbed end 54 includes an annular stop 56 . a cap 58 is press fit over barbed end 54 and over annular stop 56 to form a seal about annular stop 56 . a tear - away ring 62 is attached to , or alternatively formed with , cap 58 to hold cap 58 in position over barbed end 54 . tear - away ring 62 is positioned such that breaking the seal between cap 58 and annular stop 56 requires a permanent and evident alteration to tear - away ring 62 to thereby evidence breaking of the seal . in addition , cap 58 includes a plug 60 which forms another seal with barbed end 54 . fig9 shows an alternative embodiment in which a rigid port 70 , made of rigid plastic in this illustrative embodiment , is welded to reservoir 30 to form a drinking port . the drinking port of rigid port 70 is sealed by a user - breakable sealing membrane 80 . the beverage concentrate is sealed within reservoir 30 in the manner described above . to access the beverage concentrate , the user pierces membrane 80 with barbed end 74 of a barbed connector 72 as indicated by arrow 82 . barbed connector 72 includes a center annular flange 76 which forms a seal against rigid port 70 as barbs of barbed end 74 hold barbed connector 72 in place within rigid port 70 . the user then fits drinking hose 22 over barbed end 78 of barbed connector 72 . as described above with respect to fig7 , the user can then fill reservoir 30 through drinking hose 50 or , alternatively , through port 34 . an alternative configuration of drinking hose 22 is shown in fig1 . a bite valve 84 is welded to , formed with , or alternatively press fit onto drinking hose 22 . bite valve 84 and a portion of drinking hose 22 are encased by a heat - shrink seal 86 which is removed by the user to drinking from bite valve 84 . removal of heat - shrink seal 86 is evident such that a user can be assured that the beverage has not been accessed since sealing of heat - shrink seal 86 . in the embodiment of fig1 , it is preferred that water can be added to the beverage concentrate through alternative port 34 as filling reservoir 30 through bite valve 84 can prove difficult for the user at most publicly available water sources . in another embodiment , personal hydration pack 10 ( fig1 ) is obviated altogether by attaching inexpensive shoulder straps directly to reservoir 20 . specifically , the welded perimeter of reservoir 20 ( fig2 ) provides a place for welding of ends of shoulder straps such that reservoir 20 can be carried directly on the back of a user without personal hydration pack 10 ( fig1 ). similarly , a waist strap can be attached directly to reservoir 20 in an analogous manner . such straps can be made adjustable using conventional techniques . the above description is illustrative only and is not limiting . for example , while welding is described herein as one embodiment for sealing a beverage in a flexible bag container , it should be appreciated that generally any technique for sealing a beverage in a flexible bag container can be used . it is also preferred that the reservoir support labeling in accordance with any applicable jurisdiction for the sale of pre - packaged beverages , including direct printing of content information on reservoir 20 and adhesive , pre - printed labels bearing such requisite information . the present invention is defined solely by the claims which follow and their full range of equivalents .
a beverage reservoir for a personal hydration device is filled with a beverage concentrate and sealed in a tamper - evident manner . as a result , the reservoir can be sold pre - filled and the user can simply add water from any of a multitude of public water sources to form a beverage and use the reservoir confident that the beverage contains no mold , fungus , or residue from previously stored and consumed beverage . the reservoir can also include a port for re - filling such that the user can use the reservoir in a conventional manner after consumption of the beverage of the previously sealed - in beverage concentrate .