The BYO Double Wall Stainless Steel Vacuum Insulated Tumbler in Matte Aqua is a beautiful tumbler great for enjoying cool refreshing water or sipping a hot chocolate on the park bench. The tumbler is constructed with 18/8 double-wall stainless steel and completed with a vacuum insulated design that can keep cold drinks cold up to 24 hours and hot drinks warm for up to 8 hours. The tumbler will never sweat or be hot to the touch. The tumbler base is designed to fit in most cup holders making it practical to have with you on your daily commute. The lid, made out of ultra-durable transparent Tritan, is engineered to be used with one hand. The lid easily slides left or right to close or open. When closed, the lid is spill proof. Use this tumbler worry free with it being food and Lead Safety tested plus it’s PVC, BPA, latex and phthalate-free. With its many smart features and 30 oz size, the BYO Tumbler will be enjoyed by all who use it. For best and proper care, hand wash only.