Custom Tumblers & Travel Mugs, Beluga 40 oz Double Walled Tumbler Mug w/ Plastic Liner - Insulated, Wildy popular 40 oz. double walled insulated tumbler travel mug with stainless steel outer wall and polypropylene inner wall liner keeps your drink cold or hot for an extended time. Powder coated finish with removable screw-on twist closure leak resistant straw lid. BPA Free. Hand wash only. Please inquire for engraving or 4 color process printing. ... #SSTB042L $10.58/each.