Great design and very clever, well proportioned latch mechanism. Printed in Prusament PETG on an Original Prusa i3 Mk3. I used .2mm layer height with no supports and 80% infill. Total print time was about eight hours for the top and bottom parts and another two hours for the hinges and latch. I didn’t have TPU so I opened a variety pack of rubber bands and found one I could carefully fit along the inside of the seal. It works very well so far! My only bit of feedback would be to somehow keep the latches from being able to swing back into the container when it’s opened. It’s ultimately a small inconvenience but could help make this even better. Thanks again, zx82net!