Silicone bonded glass bottle for easy, baby-approved gripping that mimics skin-to-skin contact Designed so milk never touches plastic Made of premium, durable, and heat-resistant borosilicate glass Silicone anti-colic valve helps control flow as baby feeds, reducing colic and gas Award Winner: 2025 Baby Safety Alliance Award of Excellence Winner Comes with two Stage 1 Slow Flow Nipples (for 0m+) Natural-feel nipples are designed to mimic breastfeeding so baby can comfortably switch between breast and bottle feeding