Car cup coaster

Hi,
I am a fresh person who wants to join the ranks of designing and 3d printing. This is my first 3d project. I apologise for any mistakes I may have made when designing the model Check options for fill, structure etc before printing; unfortunately I don't have my own 3d printer yet so I can't print my design which I hope to change soon. If you have any errors or advice please message me. I would be very grateful if you could send me a photo after printing.

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