Related Clues:

• Jar toppers
• Spillage preventers
• Pan toppers
• Tupperware toppers
• Eyeshades?
• Tupperware covers
• Oft-flipped items?
• Baseball caps, e.g
• Teapot toppers
• Big Gulp necessities
• Hats, informally
• When they're closed you can't see in or out
• Tupperware parts
• Pan covers
• Stack at the coffee bar