HAND WASH ONLY: Fimibuke kids insulated water bottle is made of premium 18/8 stainless steel, fully resistant to oxidation and corrosion. This water bottle comprises BPA-free, food-safe, non-toxic materials, making it safe for your kids. In order to maintain the vibrant colors, please clean the cup by hand washing. This metal water bottle includes 2 Kids Stainless Steel Water Bottles, 2 Leak Proof Lids, 4 Straws, 2 Straw Cleaning Brushes DOUBLE WALLED VACUUM INSULATED: With double-walled vacuum insulation, these kids cups can preserve beverage temperature up to 24 hours for cold and 12 hours for hot. In addition, the double walled design makes the bottle sweat-free, allowing to carry kids favorite drinks around to keep them hydrated without making messes. Also, the top mouth is wide enough for convenient refilling and inserting ice cubes or fruits. This is designed to preserve the quality and temperature of kids beverage FUN AND EASE OF USE: Available in a wide range of colors and