Made of Premium TPU, This 2 Liter Hydration Reservoir Is Amazingly Easy to Open, Close, Fill, Use & Clean. Fits Inside Virtually Any Backpack or Hydration Pack (Not Included). Had it with flimsy hydration bladders - the kind that easily crack, leak, and make your water taste weird? Upgrade to the Water Buffalo 2L Hydration Bladder Unlike other water bladders for backpacks and hydration packs, this one features: Exclusive extra-wide opening for hassle-free filling & cleaning Unique sliding top that slips on & off smoothly & easily... locks in place securely... and comes with its own attached cord so it won\'t get lost Inner baffle that helps keep water from sloshing around Ultra-strong locking mechanism - where you connect the drinking tube to the bladder - specially engineered for a virtually leakproof seal Sturdy, flexible drinking tube, covered with a special insulated sleeve that keeps your water pleasantly cool (so it won\'t over-heat in hot weather or freeze in cold conditions) Soft, comfortable mouthpiece that allows plentiful water-flow Attached cap that keeps the mouthpiece clean & helps prevent messy leaks Special slots for attaching to any hydration pack????? To top it off, your Water Buffalo water reservoir comes in flexible, durable, BPA-free TPU - not ordinary cheap plastic - so it: Resists cracking & tearing Never gives your water that odd, plasticky taste All This Plus Practical Details... ... like handy measurements printed down the left side & helpful instructions printed at top. Add to Cart Now for Yourself & Your Gift List