Insulator is transparent so you can easily see how much liquid is in the bottle
Especially great for parents who travel with frozen breast milk, the Boob Insulator can also be use to keep milk frozen longer
The Insulator works with the nipple/collar installed, as well as the breast pump adapter or bottle cap
Insulator has a 5-ounce capacity
For ages birth and up.
Works with 5oz Joovy Boob PPU Bottles.