Related Clues:

• Like the function f(x) = x^3
• Shaped like a regular die
• Copper pen in 3-D
• Involving up to third powers (maths)
• ___ inches (unit of volume)
• Dice-shaped
• Apt rhyme for "Rubik"
• Of a regular solid
• With six faces
• Having the shape of Rubik's puzzle
• Having six faces
• Like units of volume