Baby\'s Stainless Steel Thermal Flasks for liquids Thermic Liquid Line – available is different sizes and designs. The new stainless steel thermal flasks are ideal for trips out with your child, visiting family or going out for a walk. Features: Stainless steel vacuum flask. Perfect for journeys and keeping liquids hot or cold. Keeps drinks cold for 24 hours. Keeps drinks hot for up to 12 hours. Made from stainless steel that is shock resistant. Do not use in the microwave. Dimensions: 350 ml: 6.5 x 21.5 cm 500 ml: 6.5 x 26.5 cm