Klean Kanteen Rise Lowball Tumbler 10oz (280ml) - Stellar Our 280ml Rise Lowball tumbler has a comfortably slender rim and contours designed to fit your hand. Built from certified 90% post-consumer recycled 18/8 stainless steel, with award-winning Climate Lock™ insulation, durable Klean Coat® finish and our splash-proof Flip Lid. A lowball cup made for sipping and swilling cocktails, whiskey, and any hot or cold drink, indoors and out. Its insulation allows for 2 hours of hot and 10 hours of cold beverages to provide a long lasting and enjoyable drinking experience. Thermal resistance prevents surface heat transfer, leaving the exterior cool to the touch.