Premium Material: 20 oz tumbler is made of food-grade stainless steel, wear-resistant and durable, not easy to break, will not rust; The plastic tumbler lid is made of AS and not contain BPA, transparent and lightweight, high temperature resistant and not easily broken; Safe tumblers bring you a healthy drinking needs.
Double Wall Vacuum Insulated Tumbler: Our stainless steel tumbler uses double-layer vacuum insulation technology to ensure the drinks in the cup keep cold or warm for a long time that extends your drinking time; It can keep water warm for 6 hours and cold for 12 hours, suitable for water, coffee, milk, cocoa, juice or more