New Wave Enviro 350 ML Stainless Steel Insulated Food Container in partnership with Healthy Child Healthy World Leakproof #304 Food Grade Stainless Steel BpA, BpS Free, Phthalate Free, Lead Free, CPSIA tested safe Easy to clean/dishwasher safe. Keeps food hot or cold. hot: 4-5 hours//cold: 6-7 hours Wide 3" mouth