They say wine is the secret to a long, happy life. Its double-insulated walls help retain your drinks soothingly hot or refreshingly cold, while the stainless steel, stemless design makes for incredible durability and ease of use. .: Material: 18/8 food grade stainless steel .: One size: 12oz (0.35 l) .: Seamless vacuum-insulated double-wall construction .: Clear, BPA-free press-on lid with slide closure .: Keeps liquids cold for 12 hours & hot for 6 hours .: Horizontal stipple print texture .: Hand wash only