Perfect for morning hikes, afternoon ski lessons or the evening campfire. Our 20oz (591ml) bottle is made of professional grade stainless steel and features a wide mouth making it easier for you to fill. Our double-walled thermal insulation maintains the temperature of your drinks for hours. Thanks to its professional-grade 18/8 stainless steel construction, enjoy rock-solid durability and unaltered taste without flavor transfer. It's unbreakable and isn't sentient.