The Ashford Sub Max 1 Litre Bottle is manufactured using Stainless Steel. This large, on-the-go bottle is BPA-FREE and double-walled, which means your cold liquids stay colder for longer and your hot liquids stay hotter for longer. The bottle has a full-color matt finish with a stylish stainless steel screw cap. The bottle also has a full sublimation coating, allowing for full-color coverage as indicated in the branding guidelines. *Please note that this product is not microwave or dishwasher safe*