Chafing fuel is used for heating food and these products often contain methanol, ethanol, or diethylene glycol, as these may be burned safely indoors. The common gel methanol or ethanol chafing fuel are similar with regards to consistency, both having a gel form. These types of chafing fuel are contained in a steel can with a resealable plug lid and come in sizes based on burn times; two, four, and six-hour burn times are the most common. Diethylene glycol chafing fuel differs because the container housing the fuel is equipped with a wick to allow the chemical to be com-busted. The fuel is in a liquid form and thus the canister in which it is contained usually differs by having a more leak resistant screw cap lid rather than a plug.