Move to our Straw Sippy Cup or Stainless Steel Straw Sippy Cup at 8mo+ to continue baby’s drinking journey – straws strengthen muscles in the mouth that are important for eating and talking. The entire range is 100% watertight and leak-proof, open or closed or upside down. Use them at home or on the go – the range has been specifically designed with spill and temperature control in mind. Learning cup nipples are interchangeable, all spouts and straws made from 100% supple silicone, and the handles, which can help baby hold the bottle, can be removed if needed. As always materials are BPA, Lead & Phthalate free.