They are not securely attached to the advent bottles. If I flip the bottle over the top will fall off. I have not sanitized them (boiled for 5mins) so I don't know if they will shrink to fit to size. All it's doing is covering bottle nipple to stay clean and why I am giving it a 3 star as it's only doing half the job it's suppose to be doing. It can not be used for on the go as it will eventually leak.
Nenesupply 9Oz Wide Mouth Feeding And Storage Bottle Compatible With Spectra S2, S1, And 9 Plus Pumps - Includes Nipple, Sealing Disc, And Compatible With Spectra S2 Accessories And Pump Parts
34 Review
Compact Baby Bottle Drying Rack With Brush By Termichy- Ideal For Working Moms, Family Visits, Camping, And More - Large Capacity For Convenient And Efficient Drying
34 Review
Organize Your Baby Bottles Effortlessly With The Termichy Large Capacity Bottle Drying Rack In Pink
32 Review
Maymom Wide Neck Breastmilk Collection N Storage Bottle 5.4 Oz; Re-Markable SureSeal Disc. Compatible With Spectra S2 Spectra S1 Spectra 9 Plus
26 Review
Plum Organics Hearty Veggie Variety 🍼 Pack, 3.5oz Pouches, 18-Pack - Organic Baby Food
8 Review
🍼 Organic Stage 2 Baby Food, Squash & Peas - Earth's Best, 3.5 oz Pouch (Pack of 12)
7 Review
🥦 Sprout Organic Baby Food, Mediterranean Veggie Power Bowl with Beans & Quinoa, 5 Oz Bowl (8 Count) - Ideal for Toddlers & Infants
8 Review
Earth's Best Non-GMO Soy Plant Based Infant Powder Formula: Iron, Omega-3 DHA & 6 ARA, 21 oz – Comprehensive Nutrition for Infants
7 Review