Placing my first orders for flavoring from several vendors. When I'm at TFA and I see the savings by buying the 4 oz size it just seems hard to resist. I've researched most of the recipes I plan to try and am mostly only buying those flavors, but I am buying multiple fruit flavors that I just want to play with and see how it goes. I have no idea how far 4 oz will go compared to .27 ml from OSDIY, but the math says I'm crazy to buy in smaller quantities. Of course if I don't use it I'm a fool. What makes the most sense to those of you who have experience?