Ebenezer Thorndike's Lobster Trap

Origin
Used to catch primarily lobsters and crayfish, lobster traps are constructed into two distinct parts. The chamber or kitchen contains the bait, while the parlor prevents escape, allowing the trap to be filled with several lobsters. Most are metal and wood with a mesh design to easily see the catch, and have buoys attached to make relocating them easier. First invented in Massachusetts by Ebenezer Thorndike, it became widely used along the American and Canadian eastern coasts.

Effects
Opening the lid causes the prime user to grow a hard outer layer across their skin, until they are too heavy and rigid to move without crawling. If left open, the trap will suck in nearby people and cram them inside, to extreme discomfort.