Covet

This tree, which can reach 40 feet height, requires mild temperatures and has a thick bark similar to cork, with which wine bottle stoppers are made. But a decoction of covet bark has the property of purifying water.
The equivalent of one vial of this preparation eliminates all bacteria in 5 gallons of water. Note however that it only acts on bacteria and microbes, therefore protects against all kinds of diseases, but in no case the covet neutralize a poison effect.