Taster

noun

1. An object in which, or by which, food or drink is tasted, for example a dram cup
2. Someone who tastes something, especially food, wine etc., for quality.
3. A kind of zooid situated on the polyp-stem of certain Siphonophorae, resembling the feeding zooids, but destitute of mouths.
4. A sample of something bigger or grander intended for future use

   "The exhibition was a taster of products set to hit the market."

5. A person who is, by genetic makeup, able to taste phenylthiocarbamide