Shopping Trolley Cart Key

I was fed up of constantly looking for coins or forgetting coins with me when going shopping. This is the design I came up with that I printed in hundreds of pieces for friends and family and it works really well. Just put it in straight into the cart, turn to the side and pull it out! It takes a bit of time to get used to but eventually it will be muscle memory :).

UPDATE:

Developed a new model that is optimized for using the lowest amount of filament possible while still retaining its properties. I made a loop so that it doesn't move around on the keys too much and is less fiddly.