Each Signature Swig Life Tumbler keeps drinks cold up to 24 hours and hot up to 12 with its double-wall, vacuum-sealed copper coated insulation. The non-slip silicone base keeps your cups from tipping or making too much noise when you set them down. The powder-coated finish keeps your Swig looking fresh and is dishwasher safe! The newly-designed SEAL-TITE Tritan lid is BPA free, spill resistant and shatterproof. These clear lids seal tightly with a rubber seal gasket while allowing you to see inside. The straw friendly opening can be covered with the sliding closure to minimize spilling. Each Tumbler also includes a reusable and dishwasher safe BPA-free polypropylene straw. Details - Capacity - 32oz. Temperature - Cold up to 24 hours and hot up to 12 hours. Material - Thicker, Professional Grade - 18/8 Stainless Steel.. Lid - BPA-free, spill resistant and shatterproof Tritan lid. Straw - Reusable, polypropylene straw. Patent Pending. Always use caution when handling hot liquids