What is the best/easiest way to sample juices without having to put them in a tank? I have a couple itaste vv and an itaste MVP2. I like to mix flavors, try new flavors, etc. but don't want to put them in a tank unless I know I'll like them. I'm assuming I have to go the drip route, which is fine, just don't want to spend a lot and not sure what will work with my batteries. Any help/advice is much appreciated!