Contigo Autoseal Drake Vacuum-Insulated Stainless Steel Water Bottle, 20-Ounce Double wall vacuum-insulated stainless steel water bottle keeps beverages cold for 20 hours One-handed operation for convenient drinking during activities - just press the button to sip; release to automatically seal This insulated stainless steel water bottle features patented autoseal technology for 100 percent spill-proof & leak-proof performance Insulated stainless steel water bottle is made out of 100 percent fda-approved, bpa-free materials Top rack dishwasher safe