Related Clues:

• Soundproofing material
• Fire extinguisher output
• Head of the brewery?
• Cappuccino head
• Cappuccino feature
• Stout head
• Cushion material
• Beer head
• Cappuccino topper
• Shipping cushion, perhaps
• Top of a draft
• Fire extinguisher's output
• Latte topper
• White water stuff
• "... oceans, white with ___"