This BPA free, double-walled cup is awesome. My husband and I have been actively using this exact same set up since I brought them into my shop in March and we love them. The fun colors are just the start. These cups hold 16oz of cold liquid for those long summer days. The cozy is 100% cotton & comes off for easy washing. It can be used on any number of 16 oz to go cups. Each cup comes with removable cozy and matching plastic straw.