Pill boxes, approx 50mm diameter

thingiverse

Small, screw-top containers possess unique multistart threads, making them non-standard. These are available in two sizes with various cap options. Smaller containers exhibit more threads of smaller sections, which may be easier to print. Manufactured using Diamond Age PLA on an Ultimaker, at 0.2mm layer height and 200°C, these containers feature caps that require a 'running-in' process for a snug fit. Clean the threads thoroughly before forcing the cap onto the container while holding it with a tool. Repeat this action several times to achieve a perfect fit without play or slack.