I wanted to add a bit of playfulness to this, and what's better than the classic, mischievous internet troll? You'll love this if you recognize the Internet meme culture.
Fits in your wallet. You can pull the troll out of the trolley if you like.
Print with PETG.
Layer Height: 0.12 mm (Make sure to change filament for the last 4 layers with this thickness setting)
Infill density: 100% (irrelevant)
Design is here: https://www.tinkercad.com/things/kBaHVqM3ga9-supermarket-trolley-troll-petg-print
The author remixed this model.
Important note: Troll face is copyright-protected material by Carlos Ramirez. The rest of the design is free and my own work.