The set is a lunch box, being represented by a blue 2x4 brick, made out of two pieces - a cover, and another piece, where food can be put.
This is a description taken from LEGO.com. Do not modify it.
Lunch in LEGO® style!
Show your endless appetite for LEGO® building fun with this iconic 2x4 LEGO brick Lunch
Box. It's roomy enough to hold 2 Mini Boxes for fruits, veggies, nuts and more. Makes a great gift for LEGO fans!
Fit 2 5001382 LEGO® Mini Boxes inside to keep snacks separate!
Makes a great gift for LEGO fans!
Measures 8” (20cm) long, 4” (10cm) wide and 3” (7cm) high