Dr. Brown's Natural Flow® Options+TM 細口ガラス哺乳瓶用シリコンスリーブ

The silicone sleeve fits snugly over the bottle and gives me a much better grip, especially during middle-of-the-night feedings. My hands don't slip even when the bottle is wet, and it's easy to pop off for cleaning.

Dropped these a few times and the glass hasn’t cracked once—the silicone is genuinely grippy, even with wet hands. My little one can also hold the bottle herself now without it slipping. Worth it for the peace of mind alone.

The fit is snug enough that I never worry about shattered glass when my baby flails mid-feed, and the silicone has a nice tacky grip that’s easier to hold than the bare bottle. It slides on and off easily for washing, which is a relief since we go through them constantly.