FIFTY/FIFTY® double-wall vacuum-insulated stainless steel bottles are made of lightweight 18/8 stainless steel that is recyclable, non-leaching and will not retain taste or odor. Available in a variety of sizes, from 18oz – 64oz, and in many fun color options, FIFTY/FIFTY® bottles keep liquids cold or hot all day. And even better, the double-wall technology prevents condensation on the outside of the bottle.