TSI’s OEM reservoir products are your best source for fast turnaround, fully customized reservoirs for backpacks.
Our reservoirs are based on a true taste-free bladder film that is made in the USA, of a tough and durable medical-grade PE film. Assembled in our cleanroom manufacturing facility, you are assured of contaminant-free products which are Berry, CalProp-65 and REACH compliant.
Chose a bladder type below that fits your needs, and “Build Your Own” to create the exact configuration you want. Or, for low quantity applications, choose one of our off-the-shelf Mazama brands.
Basic with Finger Loop
Custom shaped bladder 1.5L, 2.0L or 3.0L capacity with traditional 63mm, 1/2-turn open/close, threaded fill port for ease of use. Finger loop give additional grip for filling and loading.Build Your Own
Top Fill G4 Reservoir, Long Handle
2.0L or 3.0L capacity with our unique TopFill bladder closure. The highly reliable TopFill bladder closure is the easiest in the market to open, fill and close, as well as to clean and dry. Optional Drying Clip holds the bladder open, and drains water out of the drink tube. Full Length handle assists in filling and loading into a pack.Build Your Own
Top Fill Generation 4, No Handle
2.0L or 3.0L capacity with our unique TopFill bladder closure. The highly reliable TopFill bladder closure is the easiest in the market to open, fill and close, as well as to clean and dry. Optional Drying Clip holds the bladder open, and drains water out of the drink tube.Build Your Own
Finally! Two separate easy-fill drink chambers for two drinks. Keep water in one, and electrolytes in the other to manage hydration like a pro. Separate drink tubes with magnetic attachments for the Bite Valves make it easy to hydrate and take in electrolytes. The DualChamber can also be converted to a pressured bladder system, simply by detaching the drink tube for the rear chamber, and attaching a manual hand pump.Build Your Own
1.0L, 1.5L, 2.0L or 3.0L capacity that incorporates a 35 mm threaded cap with retainer loops and easy-grip top flange for easy of filling, carrying or loading into a backpack. An optional QCD Cap coming soon, that will convert the bladder into a soft bottle with carry strap, a length of tubing and a Bite Valve at the end.Build Your Own
Our unique DualCap fill-port incorporates a 53mm inner cap that is perfect for filling your reservoir, while the 80 mm outer cap is designed for ease of cleaning and drying the bladder. The 80mm Cap includes a unique grip design that makes it easy to open and close the inner 53mm fill-cap.Build Your Own
TSI is the only manufacturer that can build a custom reservoir in any shape you need for your pack. Don’t limit your pack design to off the shelf bladders. With our full custom program we can work with you to build a truly unique reservoir.
Custom shaped bladder in any capacity with easy open/easy close 63mm 1/2 turn cap for simple filling.Build Your Own