Dr browns bottles irritating

I love the nipple flow of the preemie for my baby since he tries to drink so quickly. But I'm tired of these stupid bottles leaking. I've heard " don't tighten it to much" and I've tried it all. This is stupid. I'm losing my milk and hes getting his clothes wet all the time because of it. What other bottles go with the small nipples from dr browns ? Glass is preferred.