You can also use it to enhance ordinary shave soaps.
A puck of Williams in the bottom of a bowl or shallow
coffee mug plays well with a pea size bit of Proraso.

A $1.75 puck or two of williams will make a $9.00 tube of
Proraso last three times as long when used together.

Proraso like many soaps peaks with an specific amount
of water. If you dribble the water bit by bit and
keep working the brush the amount of water it will
take is astounding yet the lather still holds up.