1 oz. glass jar (must have glass or bakelite stopper otherwise the iodine will react with the plastic or metal stopper and destroy it.) Actually 0.1 gram is adequate for the job, but using a larger amount of iodine creates a saturated

solution much quicker.

Put in 1 oz. (1 tablespoon or 3 teaspoons) of water (at least room temperature, body temperature prefered).