Ground breaking technology combines the strength of stainless steel with the softness of ceramic creating an unparalleled drinking experience. Once you drink from CeramiSteel you may never want to go back to plain stainless. - 22 ounce tumbler. - Premium 304 stainless steel and available with a colored powder coating. - Includes a ceramic coated liner that will not break, crack or chip. - No metallic taste. No trapped smells or flavors. - Does not stain. Easier to clean. Dishwasher durable. - Vacuum insulation with incredible temperature retention. - Push in acrylic top with EZ clean sliding closure. - BPA Free, Phthalate Free, Prop 65 & FDA compliant.