For a simple Strawberry/Cucumber, I personally like that I don't need as much flavoring as most here. You can just take out the cucumber flavor if you don't like it. My Strawberry mix that I have uses 3% or 32 drops for a 30 ml bottle. I have found that other flavors compliment the strawberry to bring out the flavor more. One that I have is as follows 30PG/70VG @ 6 mg nic. after mixing nic, vg, pg, and flavorings together. For flavors, I use, Ripe Strawberry (TFA) 3%/32 drops, Cucumber (CAP) .25%/3 drops, Cotton Candy (TFA) 1%/10 drops, and Juicy Lemon (CAP) .25%/3 drops I have found that the flavoring is about 35 drops per ml. That is the good thing with having percentages instead of drops so you can mix a 10 ml, 15 ml, or 30 ml ect and have it taste the same. Ejuice me up is a great calculator to use if you don't have it. Remember to start small %'s because it is easier to add flavor than take out. Hope this helps.