I started on this project as a means of having a lasting prop to add to my french mime outfit from Clair Obscur expedition 33. I made the model using a photoscanned baguette as a base and reworked to be print friendly. The model was made into multiple pieces and hollowed out to make printing easier but also to function as a storage container. I made sure to add spaces for magnets and connection pieces. 

You would still need 9mm diameter magnets that are very strong or they might not hold the top closed, the connection pieces are a very tight fit but depending on your printer you might have to adjust the sizing a bit.