I am a stickler for using a little filament as possible in a print, so I designed my own streamlined travel pill box. The one shown in the images is printed at 80%, I recommend not going any smaller as the walls may become too thin. I used one that was 100% and it fit about twice as much as this one does, possibly more. I simply resized in cura and the model fits really well. The end is tapered so that it fits snugly to hold it shut, but the rest should slide smoothly once open. I modified the handle to be able to pull on it, the one in the picture was a bit too narrow.