Platypus Classic Bottle with Closure Cap 1.0L Added Durability: New film is softer and more flexible, yet provides added durability for daily use Easy Carrying: Tapered mid-section with new grab and hang loop makes drinking easy Anti-Microbial Treatment: All-natural SlimeGuard antimicrobial keeps your water fresh and taste-free Collapsible: 80% lighter and more compact than an empty hard bottle of equal volume Versatile: Allows you to attach different lids&#8212;even hydration tubes and accessories