People sometimes use hand sanitizer to remove the infectious agents on their hands. The sanitizer could be in the form of liquid, gel or foam. It can be classified as one of two types depending on the active ingredient used: alcohol-based or alcohol-free. Sanitizer in different volumes could be produced and offered for various usage, e.g. smaller size for hand-carry, standard size for home or office or larger refill pack size for the dispensers in restaurants or malls.