Hello, I have a question. I buy 250ML bottle of 50/50 mix 3%nic bubblegum online I always order "Strong flavor" but this time they forgot to add it. I see the website I buy from sells just flavoring and I was wondering for any help out there how many drops would be ok to add to a 250ML bottle of already flavored to give it a bit more? I don't want to screw it up but disappointed to have this large bottle and don't want to deal with exchange or returning. Also since they sell "Flavor" cheap I could save money making my premixed juices "Strong flavor" on my own? ANy help would be great! 