Trolley Token
pinshape
Simple double-ended trolley token available in three denominations: British pound coin, US quarter dollar, and one euro. I've only tested the £ version, but the others appear suitable based on online dimensions. The pound one functions correctly, having been successfully tried at Tesco, Marks & Spencer, and a local garden centre. Although I haven't tried the other versions due to the obvious reason, I thought the double-ended design would provide a practical grip area, doubling its lifespan since it can be used from either end. Since it's made of plastic, this was an advantage. I chose not to add a key ring hole as attaching keys to the trolley didn't seem like a good idea - it's better to keep it in your pocket or purse for convenience. Additional ideas and projects are available at www.3dprinterclocks.com.
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