• Wolverine 20 oz Tumbler Powder Coated And Copper Lining. Double-wall, vacuum insulated, 18/8 stainless steel. • 22 oz Double Wall Stainless Steel Vacuum Water Bottle w/Bamboo Lid And Copper Lining. Double-wall, vacuum insulated, 18/8 stainless steel. NOTE: Product comes with Prop 65 warning label when shipped to California. Label reads: "WARNING: This product may contain carcinogen, which is known to the State of California to cause Cancer and Reproductive Harm. For more information, go to www.P65Warnings.ca.gov.