FreeSip spout makes it possible to drink in two different ways: Hold it upright to sip through the built-in straw, or tilt back to chug through the wide-mouth opening Patented locking push-button lid flips open for drinking or closed to keep the spout clean; a convenient carry loop doubles as a lock Triple-layer, vacuum-insulated stainless-steel construction keeps drinks cold for up to 24 hrs. Not for use with hot liquids Wide opening for easy cleaning and adding ice Base of bottle is cup holder-friendly Hand-wash bottle; lid is dishwasher-safe