Metal plates and metal trays sold as a unit for holding electronic cigarette cartridges and vaporizer cartridges for use when emptying and refilling the cartridges of their oils, when heating the cartridges, and for collecting unused oil from the cartridges; metal plates for holding electronic cigarette cartridges and vaporizer cartridges for use when emptying and refilling the cartridges of their oils and when heating the cartridges; and metal trays for collecting the unused oil from electro...