Exacto Blade Disposal - No support needed

thingiverse

Humans create small enclosed boxes meant to print without support, then use to discard used sharp exacto blades securely. These boxes are designed so that the blades cannot be easily retrieved without destroying them. A crucial design feature is an internal taper preventing the blades from escaping even after vigorous shaking. The overall dimensions of these boxes measure 30mm x 30mm x 60mm. The opening is precisely 2mm wide and 26mm long, with a subtle fillet to facilitate easy disposal of blades.