(Feature Request) Flavoring quantities

A good idea would be to have some way to save your quantities on hand, per flavor, in your “My Flavor Stash” area. Maybe a text entry box, or possibly different radio buttons, i.e 10ml, 15 ml, 30 ml, 4oz., 8oz., etc. I personally have many different sizes and sometimes double bottles and loose track of how much I have on hand. Just my .02.