Expedition Cup Set - Stacking, Insulated Stainless Steel Cups with Oilskin BagNo more clanking enamel cups rattling around in your rucksack, or taking scratched plastic glasses down the beach, our vacuum insulated stainless steel cups neatly stack into their included waxed cotton bag making them perfect for hot and cold drinks outside whatever the weather. Our new upgraded cups are made from high grade stainless steel with vacuum insulation, and each 10oz cup (which is about a 1 2 pint) keeps your coffee hot and your cold