Our mommies really liked their Kleen Kanteens. They loved the fact that they are free of harmful chemicals such as BPA, which is can be found in plastic bottles and sippies. Because they are made out of 18/8, food-grade Stainless Steel, you never have to worry about checking the inside of these bottles for cracks or peeling of plastic liners that Aluminum bottles contain. Our mommies loved the bright colours that the Kleen Kanteens come in and that it keeps little ones drinks cooler for longer up to 24 hours. Kleen Kanteens are compatible with the Avent sippy spout, and you can also get a Sports Cap for their Kleen Kanteen when your toddler outgrows the sippy spout! Kleen Kanteens come in 12oz, 18oz and 27oz sizes, so you can get one for your whole family. You can purchase Kleen Kanteens here at Coco Baby Boutique in the 12oz and 18oz sizes and we also carry the Advent Sippy Spouts and Sports Caps.