I took a can of chicken broth and used a pocket knife style can opener to open a slit in it emptied the soup out rinsed it out and that's where my blades go.
Welcome aboard! I use an old Proraso tub. I cut a slit in the lid and toss them in. The tub fits the motif of a shave den at least. It holds three years worth of blades. Then when full, I toss the blades in to a sheet of foil and toss it in to my recycling bin.