Frezonika Koala Silicone Sleeves for Dr. Brown Narrow Glass Bottles 4 oz (4-Pack, Beige)

Meet Frezonika Koala Silicone Sleeves — a practical, playful set of four beige sleeves designed to fit Dr. Brown narrow-neck glass bottles (4 oz / 120 mL). The koala silhouette adds a friendly touch without altering the bottle’s design, while the sleeves bring thoughtful details to everyday feeding.

These sleeves are tailored for a precise fit on narrow glass bottles, compatible with Dr. Brown Natural Flow narrow-neck glass bottles in 4 oz and 8 oz sizes. They are not suitable for wide-neck bottles, so choosing the right bottle matters for best performance.

Key benefits include heat retention: the soft silicone helps keep milk warmer for longer, which can be helpful during slower feeds or moments when your baby is fussy. The base features a reinforced 5 mm layer that cushions contact and helps guard against minor bumps or drops.

Koala design and grip

• Custom fit for narrow bottles (4 oz / 120 mL and 8 oz) for a snug, secure sleeve
• Insulates and maintains warmth to support longer, calmer feeds
• Thickened 5 mm base cushions impact and reduces risk of glass breakage
• Adorable koala silhouette with built-in loop handles to support little hands
• Visible milk level via side cutouts to check volume at a glance

Care-free cleaning: the sleeves are BPA-free and dishwasher-safe, making maintenance simple after busy day feeds. Built to be durable, they remain flexible and comfortable to touch during handling.

Real-life scenarios

Imagine a late-evening feeding where your baby looks sleepy but needs reassurance. The warm sleeve can make the bottle feel cozy, while the visible milk level helps you confirm quantity without disturbing your little one. For busy mornings, a quick grab-and-go sleeve ensures you can prepare milk and hand it to a wiggly toddler with less fuss. The koala design adds a touch of whimsy that can help babies grip more confidently when they’re learning to hold the bottle themselves.

• Night-time or slow feeds: warmth and easy grip support focused feeding moments
• Travel or daycare: durable drop protection and quick milk checks on the go

What’s included: a set of four beige silicone sleeves, all sized for Dr Brown narrow bottles in 4 oz / 120 mL (and compatible with 8 oz lines in broader Dr Brown product families). With loop handles and a lightweight, flexible feel, these sleeves are meant to accompany regular bottle usage without added complexity.

Care and compatibility

Materials are BPA-free, and you can clean the sleeves in a dishwasher. They are designed specifically for Dr Brown Natural Flow narrow-neck glass bottles and are not compatible with wide-neck models or other bottle brands.

Choosing Frezonika sleeves means adding a simple, user-friendly accessory to your feeding routine — one that blends practicality with a touch of whimsy. It’s about comfort, safety, and a clearer view of milk levels during feeding sessions.