eeps can and bottle beverages think cold brews, craft beers, rosǸ wines and more cool until the last drop. Featuring Therma-S'well™ technology - a triple-layered, vacuum-insulated construction made of high quality, 18/8, food-grade stainless steel walls plus a copper wall layer for superior temperature retention. That means it delivers 3 hours of cool while maintaining a condensation-free exterior. Fits standard 355 ml (12 oz) cans and bottles. BPA and BPS Free. By choosing re-usable S'well products you can help reduce the use of single-use plastic products that pose a threat to our environment.