Promotional Tumblers & Travel Mugs, Wolverine 20 oz Tumbler Powder Coated And Copper Lining - 24Hr Cold & 12Hr Hot, Double wall, vacuum insulated 18/8 stainless steel tumbler with powder coated finish. Copper-lining keeps drinks cold for up to 24 hours and keeps drinks hot for up to 12 hours. Comes with a convenient clear lid with a spill-proof seal. ... #S922P $10.01/each.