This is one of my earliest work that leads me to become a 3D modelling and printing enthusiast. A simple box to safely store used blades for disposal.
There are two main versions, one with a side view and one without. Depending on the resolution of your 3D printer, normally a tolerance (default) of 0.2 mm will give you a snap-fit, without the need for any superglue it should fit well together. However, a high-accuracy tolerance (BladeDisposalLid_HT) is also available, with a 0.1 mm tolerance if your printer is capable of delivering a good resolution.

Updates: (23/04/2019)

• Rounded edges, provided one with side view