These children-orientated stainless steel bottles are eco-friendly, safe to drink from and painted with non-toxic inks. All our Cheeki lids are BPA-free. The bottles are made from pure grade 304 (18/8) stainless steel. They contain no linings and will not leach chemicals. 350ml Water Bottle. Premium Grade 304 (18/8) Stainless Steel. BPA - free lid. No inside lining and toxic free inks.