Platypus Hydration Systems Flexible, lightweight, durable and taste-free, Platypus is the modern way to keep hydrated during any outdoor activity. More versatile than metal canteens and rigid bottles, the bottles flatten when empty for convenient storage. Add a drinking tube for a hands-free hydration system, swap the bite valve for a Shower Kit or use the Filter Link for direct connection to your water filter. Platypus" triple-layer laminate is welded at the seams, highly durable and guaranteed leak-proof. In addition to water bottles, the range comprises easy-to-fill wide-mouth reservoirs, insulated bottle holsters and sophisticated all-in-one hydration backpacks. The Big Zip Hoser The Big Zip SL reservoir is the most deluxe, off-the-shelf hydration system made. Every beautiful, taste-free feature is designed to make staying hydrated easy-starting with our new SlideLock TM closure. It ensures an easy, leak-free closure every time, opens wide for easy cleaning and makes a convenient carry handle. Next up is the film. It"s BPA- free, supple, super-durable and treated with our all-natural SlimeGuard TM antimicrobial treatment to keep it taste-free. You also get an ergonomic, right-angle shut off valve for leak-free packing and a quick-disconnect hose for easy filling, cleaning and swapping of packs. Platypus awarded Best Hydration System Brand as voted by readers of Dandelion Magazine (now Women"s Adventure Magazine) in 2005.