Dr. Browns do work - it feels a tad loose when you screw it on, but it holds tight.
Here is my system:
I double pump 2 times a day and I need 3 bottles for the next day. I get a lot more from my first session then my second, so the first session, I pump directly into 2 dr. brown's bottles. My 2nd session I pump into 1 Dr. Brown's and 1 Medela. Then I chill it all and at home that night I pour what was in the 1 Medela bottle into the Dr.Browns bottles to make 3 full bottles. Any leftover I save either for the next day or to add to my freezer stash.
It took a few weeks of trying different things to get to this, but it seems to work the best for me.
Re: bottles compatible with medela
******************************
Nov siggy challenge: animals eating Thanksgiving food
Rhys - born 04.17.2013
Harry - born 04.18.2016
Francesca Pearl is here! Josephine Hope is almost 3!