This is a dispenser for plastic razor blades. (linked below)

The file includes the dispenser meant to be mounted using double stick tape to wherever you want it, and a tool to assist in the loading of it. See images above.

EDIT:

Added file with countersank screw holes also if anyone prefers not to use double stick tape.

I also added a file for a lid that just sits on top, not tight for both designs.

Link to blades:

Amazon.com: KUSUFEFI Plastic Razor Blade Scraper, 2PCS Scraper Tool with 60PCS Plastic Blades, Cleaning Scraper Remover for Stickers, Decals, Adhesive, Labels, Paint, Glass, Car, Window, Caulk, No Scratches : Tools & Home Improvement