BOTTLES

Playtex VentAire

These bottles have top and bottom that come off, with a small ring that sits in the bottom to prevent leaking. The 6oz size worked fine until we needed to start warming up the br.milk and/or formula. You do this (particularly for breast milk) by sitting the bottle in warm water for 10 minutes. While water would not get into the bottle, it would get into the removable bottom and then leak out.

When you use formula, it increases the water level by a significant amount. You can not make 6oz of formula in the playtex ventaire 6oz bottle. It overflows.

Avent

4oz and 8oz sizes. These consist of bottle, ring and nipple. They also have lids that go in the ring to allow for easy transport of a premade bottle. (The caps prevent most leaking, but not all.) These bottles do allow for the increase in liquid after adding the formula.

They also have a bottle brush that fits the bottle and nipple that is well made. I bought a cheaper brush from target and it lasted about 2 months and broke in half.

Avent also makes a container that holds upto 9oz of formula, times 3. Once you're on solid foods, the separated container can be removed and you have a container for lunch/snack.