Test Flavors, sometimes referred to as "Vault Flavors", are unreleased fascinating innovative Mountain Dew flavors produced in a low number for testing purposes. PepsiCo occasionally lets a few potential customers sample new flavors to choose what products it will bring to stores for a consumer research study.
These many flavors each have their three-digit or more number, and with limited information, we may not have accurate information about these test flavors.
Test Flavors[]
These are the known Test Flavors of Mountain Dew.