These isotherm bottle of 500ml, with singular shapes that remind the authentic milk bottle, insulate your drink thanks to their stainless steel double-wall. They keep your drinks hot for 12 hours and cold for 24 hours ! Ergonomic and durable, they are the ideal solution to take your drink (tea, coffee, chocolate, fruit juice, smoothie, soup) in all of your travels and sport activities. The silicone seal provides a perfect tightness. Hand-wash only. BPA free.