You don't mention what device you use to vape. Attomizer, cartomizer, clearomizer, or CE
The reason I ask I'll get to in a sec. Buying juice can be expensive. There are hundreds of vendors and they all have scores of their own flavors to try. The wise, economical way to approach trying new juices is to order the smallest bottle offered, or order sampler or trial packs of multiple flavors at a discount rate. This way you won't be spending between $10 - 16 on an individual juice and find that it is entirely NOT to your liking.
Now, to the device you use. Attys are cool because you are only using a few drops at a time and can change flavors at will. Cartos are a different story. Having a polyfill wicking material to hold the juice, if you don't like the flavor, you've already committed that carto to that particular flavor and you'll likely need to throw it out. People have had nice success cleaning the clearos and re-using with a different flavor.
When testing brand new juices, I really like the newer CE2's. I particularly like the smaller capacity ones (0.8ml) to try new juices. And I don't like the juice, I can either remove it and rinse the container for the next juice, or throw it away as they are so inexpensive.