Outdoor Products 2 Liter Hydration Reservoir 2.0 300D Polyester Ripstop Imported Low profile cap packs easily into bags Reservoir adapts to most hydration packs Screw-in bite valve with soft flexible tip and on/off valve Wide mouth opening great for ice Removable hose for easy cleaning Unlimited Free Two-Day Shipping Instant streaming of over 40,000 movies and TV episodes A Kindle book to borrow for free each month - with no due dates Over a million songs and hundreds of playlists