Lifefactory Glass Baby Bottles are made of the highest quality, thermal shock-resistant borosilicate glass to allow them to transition safely from freezer to boiling water. The included silicon sleeve provides a good grip for you baby's hands.
The medical-grade silicone sleeve helps to protect the bottle if dropped and serves as an excellent, no-slip grip for little hands
This 4 oz. bottle comes with a polypropylene (PP#5) cap, a ring and stopper, and includes a Stage 1 (0 - 3 months) silicone nipple
Compatible with most major breastpumps
All materials FDA approved
Designed to grow with your child, Lifefactory bottles fit a wide range of caps--from sippy to flat--that are available and sold separately