The best water bottle.Stainless steel insulated reusable and sized for epic days—our 40 oz Wide Mouth water bottle is the flask to grab to keep cold drinks cold and hot ones hot. The large opening makes it easy to add ice—and get yourself a bigger gulp.24 hours cold 12 hours hotTempShield®? double-wall vacuum insulationLeakproof when closedWon't retain odor or leftover flavorDurable stainless steelWide Mouth opening is ice-cube friendlyBPA-FreeNot for use on a stove in a microwave or freezerKeep hot liquids out of the reach of children