If you are considering getting into an already saturated market, it's best to have a concept that enables you to stand out from the pack. Whether it is an extremely niched offering (specific type of tea to a specific type of buyer), or an exclusive co-branded line of teas for a specific company, there needs to be something that makes you very different from competitors.

If there is not a significant difference, then you may want to seriously re-evaluate your product offering.

I hope this helps.