I bought a few bottles of domybear's, and the advantages are still obvious. One is that this bottle has the dual function of preventing flatulence, which can prevent air from mixing with milk. The air inlet is always at the top, and every mouthful is milk, which can avoid the loss of milk nutrition. The other is that domybear has an oval nipple in the middle of the bottle, which is more in line with the shape of a small mouth. When swallowing, it can better seal the air without air leakage.