I like how these bags stand up on their own. However, the ounce markers are off by a whole ounce. I have tested this theory several times with different bottles and bags and the Medela bags are always the ones that are off. As indicated in the picture, I pump 5 ounces almost everytime and the bag will read 6 ounces. Even though I write the correct amount on the bag, if I have a family member rushing to feed my fussy baby they may not look right away at the writing and do a quick glance at the markers instead. I wished these bags were a little more accurate because I really do love that they stand up on their own.
Rating: [5 of 5 Stars!]