3-piece baby bundle with two 4-ounce (120 ml) Lifefactory glass bottles with silicone sleeves and one Lifefactory silicone teether--great gift pack for new and expectant moms;Bottles come with Stage 1 (0-3 month) silicone nipples and polypropylene (PP#5) caps, rings, and stoppers--ideal for newborns;Thermal shock resistant borosilicate glass bottle transitions safely from freezer to boiling water; all components are dishwasher safe; sleeve and bottle can be washed/sterilized together;Bottle grows with baby--use with Lifefactory stage 1, 2, 3 and Y-cut nipples, sippy caps and leakproof flat caps ; compatible with most major breast pumps;Healthy alternative to plastic bottle feeding--all components are made in the U.S. or Europe and are BPA/BPS-free and phthalate-free