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 hot TempShield®️ double-wall vacuum insulation Leakproof when closed Won't retain odor or leftover flavor Durable stainless steel Wide Mouth opening is ice-cube friendly BPA-Free Not for use on a stove, in a microwave or freezer Keep hot liquids out of the reach of children EUC few scuffs but no dents