Dr. Brown bottles leaking

Nicole • Mama to Matilda + Betty 💕

We’ve been using Dr. Brown’s bottles because my daughter can’t get a good latch on any other nipple due to her small mouth (tiny baby overall). However, they’ve been leaking like crazy from out of the threading on the cap! It’s so freaking annoying. We don’t shake the bottle to mix the formula; we stir it, so I know it’s not from that. Anybody else have this problem? Or know of a bottle with a similar-sized nipple that doesn’t leak?