Parents with glass baby bottles, these LOTBILL silicone sleeves are total game-changers! Made from food-grade silicone that's completely safe for your little one. They provide awesome shock absorption if (or when) your baby drops the bottle - seriously reduces the chance of broken glass everywhere. The insulation helps keep milk at the right temperature longer, which is perfect for those slow feeders. Designed specifically for Philips Avent Natural Glass Bottles in 8oz size, so they fit perfectly without being loose or tight. The textured surface gives you a much better grip, especially with slippery hands from lotion or whatever. There's a handy viewing window so you can check milk levels without taking the sleeve off. Dishwasher safe for easy cleaning, and they come in a 3-pack of blue, green, and grey. Much cheaper than replacing broken glass bottles, and way more peace of mind when your toddler starts throwing things. The sleeves slide on and off easily for cleaning but stay put during use. If you love glass bottles but hate worrying about breakage, these sleeves are absolutely worth it!