Squeezable Glass Here Come the Mummies Design Water Bottle, 22 oz/600 mL Always Pure Taste - Glass-Like Inner Surface (Patented Process) Zero Leftover - Tastes, Odors, Stains or Mold (All Types of Cold Drinks) Spill-Proof Valve  On the Go Drinking, Max-Flow; No Wimpy Sips Most Sanitary  Valve removable for Thorough Cleaning, Bottle; rinse or dishwasher American Durability- 17 Year Warranty, BPA Free, Scratch Resistant Non-toxic ink