I've heard some people say add 20% to your mixture for the Tasty Puff flavoring and some say it's very strong and 2 drops to a 10ml unflavored mix is more than enough, need some advice from those that have mixed with it. I just got some in the mail, juicy fruit and the bubble gum and I haven't opened them yet, can smell the flavor thru the sealed plastic bag they came in. Thanks.