Thermos Is1114 Stainless Steel Vacuum Insulated Tumbler W/ Stainless Steel Straw 710ml is designed to Keep your drinks icy cold for up to 24 hours with Thermos™ vacuum insulation technology. Built from durable 18/8 stainless steel, this tumbler withstands daily use while its non-slip soft-touch base adds extra protection. The wide-mouth design makes cleaning easy, and it comes with a reusable stainless steel straw. Dishwasher safe (hand wash recommended).