A buffet burner is not always the most exciting piece of equipment, but it can be necessary, and then it pays to know what you are actually buying.
The most important thing to know about these fuel canisters is that the flame is almost entirely blue. That sounds like a technical detail but is in practice a safety point: in normal room light or daylight a burning canister is difficult to see. Always check that it is genuinely extinguished before handling it, and always extinguish by closing the lid on the holder, never any other way.
The fuel is gel-based ethanol, essentially the same origin as hand sanitiser but thickened. Hendi has added an artificial bittering agent so that it cannot be swallowed by mistake (or out of curiosity). The burner burns without soot or smell, which is desirable when it is to be positioned under food that is to be eaten.
Each 200-gram canister burns for approximately three hours. Important: the canister must always be seated in a fuel holder during use, both because the heat output works correctly that way and because a canister without a holder becomes extremely hot and poses a serious burn risk.
Store in a dark, well-ventilated place below 20 degrees.