TBH I prefer the old dropper top glass bottles than the newer plastic ones with the squeeze top bottle, though I haven't had issues with them leaking at all, I just prefer the older type of bottle. Since I DIY I use that type of bottle. They're leak free, though arguably less so when filling certain
tanks, but I
really prefer them as I can wash and reuse, and etc. I got mine from Nicotine river they weren't horrifically expensive but they weren't cheap either. I like having the dark glass, as well. I know the squeeze tops are really becoming the new standard, I just don't care for them as much... Good luck!
Anna