Lifefactory LF340400C4, 20-Ounce (4-Pack) The silicone sleeves provide protection and a non-slip grip while delivering a pop of color 100% made in the USA! The glasses and the silicone sleeves are produced and assembled in the USA Dishwasher safe. We do not recommend removing the sleeve. All materials are BPA/BPS-free and phthalate-free. All materials are FDA approved Great for pint of your favorite brew, also works well with iced tea and lemonade, 20 oz (600 ml)