a.k.a. SpongeBob Cube
Burger King promotional item, 2004.
(plastic, 2.5 inches)
An easy but fun puzzle where the top and bottom halves can be rotated with respect to each other and a piece can be slid up and down. Jaap's Page observes that this puzzle is like a 2 high by 4 column Whipit Tower where all pieces are different (or similar to a small Babylon Tower), and presents a solution.
Jaap's Page, from: http://www.jaapsch.net/puzzles/spongebob.htm