This product is much better than competitor brands including Nuk and Lansinoh. The heat-sealed edges make the bags seem much sturdier, so no spilled milk here! The plastic itself feels thicker as well. Like other bags, the medela pouch also lays flat to freeze and can stand. It’s difficult to get the right reading on the measurement but I just take the measurement off my bottle and write it on the bag. At 100 pouches to a box, this is also a good value for purchase.