Sistema Twist 'n' Sip Bottles have a unique lid that allows the bottle to be opened and closed without fingers touching the sipper tip for a more hygienic way to drink. Perfect for school, sports, picnics and days out,it can be washed in the dishwasher (top rack) for easy cleaning. Not intended for hot liquids or carbonated beverages, the Sistema Twist and Sip bottle is both Phthalate and BPA Free.