I am a work in progress. Last night I went through my bottles and separated them into 2 groups. They are "Love it" and "Hate it/Just Ok/Maybe needs to steep longer" groupings. I have about 20 smaller bottles that are about 10ml on average. If I think something is going to be a staple in vaping life, I plan to make all my future orders 30ml or more. So far though I only have my Candy Cane and Georgia Peach in 30 ml bottles. Hopefully as time goes on there will be overall fewer bottles, but they will be in larger amounts.