in any location on the closure lid 4 and will be of sufficient size to allow for the purpose of filling and emptying the canister the color dots 17 are in close proximity to the hole 8 and are provided for a color reference of the roasted coffee the color dots 17 are each of a different color but generally reflect the colors of roasted coffee from light to dark roast the color dots 17 have reversed out of the color field the letters l m md and d the color dots 17 and associated letters are used for reference to the flavor and aroma of the coffee when roasted to that level the closure lid 4 also has provisions for printing that can include but are not limited to the operation instructions type of coffee bean or blend origin of the coffee bean tasters comments on flavor and suggested degree of roasting the clear or translucent non porous layer 5 is laminated to the closure 4 after the closure is printed and the hole 8 has been die cut the clear or translucent layer 5 is in the preferred embodiment 0 01 mm thick polyester but can be of other thickness and is preferably clear but can be translucent the cartridge 13 is assembled by rolling the susceptor 3 into a shape that will fit into the cartridge and.