Contigo Autoseal Martinique Double Wall Insulated 18-Ounce Water Bottle, Blue Double wall construction reduces sweating and keeps beverages cold for up to 2-hour Patented autoseal lid is 100-percent leak proof and spill proof and offers convenient one handed drinking Made with 100-percent FDA-approved, BPA-free tritan Engineered to be top-rack dishwasher safe for easy care Sleek design fits car cup holders for travel