PREMIUM QUALITY & VACUUM INSULATED: Food grade 18/8 & 304 stainless steel on both inside and outside walls. Free of BPA materials. chemical toxins or metallic aftertaste transfer. Vacuum insulation creates an airless space between two walls. Virtually eliminating the convection process and temperature change. PERFECT DESIGN: 16OZ. / 450ml capacity. wide-mouth (1.9" / 5cm) for easy refilling or adding ice and fruits to your water without causing any clogging when drinking. Bottle Diameter2.6" / 6.5cm. height 9" / 23cm. fits most car cup holders. Easy-Flip Press Button Lid with built-in humanized anti-hot sipping design. One-handed opening and drinking. easy to use and carry. KEEP HOT & COLD: Double wall insulation maintains hot or cold temperature of contents for a long time. Cold liquids stay cold for 8 hours without any condensation on the outside of the bottle. Hot liquids stay hot for 12 hours. Ideal for carrying a wide variety of beverage. 100% GUARANTEE LEAK PROOF: Safely Locking Mechanism besides the flip press button to lock the flip button avoiding it opened by accident in your bag or in your vehicle cup holder. ENDLESS POSIBILITIES - This stainless steel bottle can be used at home. work. at the gym. for sports. in your car. at the beach and even camping or hiking. Typical uses include water. tea. coffee. carbonated drinks. wine & beer.