The Coll Bottles Kids stainless steel thermo bottle is the ideal choice for children because it is healthy and environmentally friendly. Thanks to the unique Triple Cool™ technology, it keeps drinks cold for up to 36 hours and warm for 18 hours. The bottle is made from food grade 18/8 stainless steel which is corrosion resistant and food safe. The finish is powder coating with 3D printing. It offers two closure options – an airtight cap or a cap with a tritan straw and handle.It does not shrink.