As for your customer that cant taste the cappucino or vanilla, I am one of those people. Most flavors have no taste, or taste like rotten honey to me, and I am 99.9% sure its not your niquid. Honestly, I've come to the conclusion that I can barely taste much of anything, expecially when it comes to niquid. But I know for a fact, that your cappucino has great flavor, every one that I have had try your cap (5-6 people) has said it tastes really good, I just cant taste it. But again I cant taste most liquid. I cant taste ry4, coffee, cap, and I bought a bottle of each from LOTS of different suppliers trying to find one that I can taste with no luck, so my sister has inherited quite a bit of free juice, lol. Your grape and redbull however, I can taste! So Im loving the stuff I bought last week!! I think some people (like me) just have really weak tastebuds, maybe from smoking too many real cigs, Who knows. I have also noticed that coffee/reeses/caramel ice cream has no flavor to me either.
Words of wisdom to people with crappy taste buds like me: STICK TO FRUITY FLAVORS!!!