Fill the burner to between ½ and ⅔ full in the fumehood away from open flame using a funnel of appropriate size.
Light the burner at this location only using matches or a barbecue lighter. Do not attempt to light the burner from another lit burner or carry a lit burner to another location. Never refill fuel to a burning alcohol lamp
Extinguish the burner flame with the burner cap. When not in use, store the cupped and cooled burner in the flammable storage cabinet.
Typical fuel is denatured alcohol.A cap is used as a snuffer for extinguishing the flame. According to the fire triangle rule, fire can be created by 3 components which are oxygen, heat, and fuel if we cut one of them the fire will be extinguished.