How to Sterilize Wide Neck Baby Glass Bottles Safely

By HEVEA: Natural Rubber Products for baby, pet, home | Published: 2026-10-25

Category: How-to Guides

Learn safe, effective methods to sterilize HEVEA wide neck baby glass bottles. Step-by-step guide for boiling, steaming, and cold water sterilization with key safety tips.

Quick answer

Boil the glass bottle and natural rubber parts separately for 5 minutes, or use a steam sterilizer without the sleeve attached. Always check the sleeve for damage after each cycle.

Why separate the sleeve before sterilizing

The HEVEA Wide Neck Baby Glass Bottle Sleeve is made from natural rubber, which can degrade faster if repeatedly exposed to high heat while stretched over the glass. Removing the sleeve before any sterilization method extends its life and keeps the protective fit snug.

Steam vs. boiling vs. cold water: which method fits your routine

Boiling is the most accessible method—no special equipment needed—but requires careful timing to avoid overheating the rubber parts. Steam sterilizers are convenient for daily use and work well with glass bottles, but the sleeve should never go inside. Cold water sterilization tablets are gentle on natural rubber and glass, but you must follow the soak time exactly to ensure full disinfection.

Step-by-step sterilization guide

1. Disassemble and rinse: Remove the sleeve, nipple, collar, and cap from the glass bottle. Rinse all parts under cool running water immediately after use to remove milk residue. Leaving milk residue to dry makes sterilization less effective.
2. Choose your method and prepare: For boiling: fill a pot with enough water to fully submerge the glass bottle and small parts. Bring to a rolling boil. For steam: place only the glass bottle, nipple, and collar in the sterilizer. For cold water: dissolve a sterilizing tablet in cool water according to package instructions. Never place the natural rubber sleeve in a steam sterilizer or microwave.
3. Sterilize the glass and small parts: Boil the glass bottle for 5 minutes, then add the nipple, collar, and cap for an additional 3 minutes. In a steam sterilizer, run a full cycle (typically 6–10 minutes). For cold water, submerge all parts for the time stated on the tablet pack (usually 15–30 minutes). Boiling glass for longer than 5 minutes is unnecessary and may cause the nipple to become sticky.
4. Sterilize the sleeve separately: After removing the glass and small parts, boil the natural rubber sleeve for 3 minutes. Do not use steam or microwave for the sleeve. For cold water, add the sleeve to the same solution after the glass parts are done. Boiling the sleeve for more than 3 minutes can accelerate wear.
5. Dry and reassemble: Use clean tongs to remove all parts. Place them on a clean, dry towel or drying rack. Let everything air-dry completely before sliding the sleeve back onto the bottle and assembling. Reassembling while parts are still damp can trap moisture and encourage bacterial growth.

Product facts

Wide Neck Baby Glass Bottle Sleeve Medium (150ml/5oz) Two-Pack: The HEVEA Wide Neck Baby Glass Bottle Sleeve is a protective natural rubber sleeve that insulates heat and provides drop resistance. Removing the sleeve before sterilization prevents heat damage, keeping it effective at protecting the bottle and your baby's hands during feeding.
Wide Neck Baby Glass Bottle Sleeve Medium (150ml/5oz) Two-Pack