Scalpmaster Liquid Shave Cream-Luxury Shaving This 8 oz bottle of shave cream is formulated to provide instant and complete hot shave cream lather dispersion in the Scalpmaster machine. Directions Add one capfull of liquid shave cream to each 8 oz of warm water. Or mix contents with 2 gallons of warm water. Gently stir the shave cream solution - it is then ready to be used.