Related Clues:

• It may be flipped
• Pop-top, for one
• Container cover
• Eye shade?
• Part of a jack-in-the-box
• Tupperware unit
• Lash locale
• Piece of Tupperware
• Shut-eye shutter
• Boater, for one
• It's not good to flip it
• Pot topper
• Coffee-to-go topper
• Coffee-to-go necessity
• Box top