Glass Sip 'n Straw Cup - 10.4 oz Safe from the inside out, the Glass Sip 'n Straw Cup is 2 sippy's in 1! With a no-drip silicone sippy top and a silicone straw top, you can help your baby easily transition to the next feeding stage. The cup is lined with tempered glass, has a plastic shell, and has a shock absorbent rubber base to help prevent peaking. Features: Made from tempered glass with a PVC and BPA free, safety tested plastic shell. Sippy top and straw top are made from FDA, food-grade silicone. Dishwasher safe, top rack only.