MOLLE stands for Modular Lightweight Load-carrying Equipment system and defines the present generation of load-bearing equipment and rucksacks utilized by the United States Army. The system's modularity is derived from the use of PALS webbing (Pouch Attachment Ladder System), rows of heavy-duty nylon stitched onto the vest as to allow for attachment of various MOLLE-compatible pouches and accessories. Presented hydration bladder is one of core components of MOLLE system, the one to replace the 1qt and 2qt canteens for on-the-go hydration, also equipped with PALS webbing for attaching extra pouches if needed. Its MOLLE construction allows creating modular connections with similar modular vests or rucksacks as a reservoir yet its adjustable in length shoulder straps enabling wear it as a normal backpack. This fully insulated carrier is leak proof and taste free and comes complete with insulated neoprene tube cover, backrest with storage pocket, hydration system equipped with a convenient On/Off valve as well as hygienic interchangeable mouthpiece and cap.