Your little one will find the transition from bottle to cup easy thanks to nuby's no-spill flip-n-sip cup€™s unique contour shape, designed to fit their small hands. The soft sipper straw is protected from contamination by a uniquely designed and easy-to-use flip top cover. This cover simply slides back and rests in the lid of the cup, allowing the sipper straw to €œflip€� out for use. Great for travel and short trips. Bpa free.