Insulated Baby Bottle Tote Bags - Lightweight BreastMilk Baby Bottle Cooler Bag (Colored Triangle(Fits Up to Most Three 8oz Bottles))

Works well but if you are using Aventurine bottles it will only hold 3 not 4.

It's cute and works perfectly for milk bottles and such.

This does not fit 8 oz Dr Browns bottles, which is what we use. Would be nice if you have bottles that are smaller.