The Oso-Cup from RaZbaby is designed to fit baby’s mouth and hands with convenient handles. Using premium BPA free silicone, Oso-Cup is very sturdy. Vented design allows for easy drinking through the straw when compared to other silicone cups. Once your little one is ready, learning to drink out of an open cup is an important developmental milestone, and the Oso-Cup helps baby transition from bottle to cup. Dishwasher safe makes cleaning Oso-Cup a breeze to clean.