You can do that, heck you could make 10ml in a 30ml bottle if you wanted to. It would allow you to shake it better for that matter. That being said I have some 8ml glass bottles (empty bottles flavors came in from WL) that I use for samples and 30ml cobalt blue bottles for my proven batches. I also have some empty 5-15ml plastic bottles cleaned out from when I use to buy store bought juice. I prefer using glass whenever possible though.
Cheers,
Steve
Cheers,
Steve

