The flavorings are incredibly potent, not the easiest and most accurate to mix with as you kind of have to mix them by drops if mixing in small batches, small meaning 30ml. Delicious tho. I have Peach, Apricot and Blueberry. The owner of my local B&M gave them to me to see what i could do with them. Honestly a 15ml bottle of this stuff will last beyond its shelf life i would imagine, for me at least.