I have an old metal coffee can with a slit in the lid. I've been dropping the used ones in there for quite a while. I've tried several rotary blade sharpeners, but they haven't worked for me. I haven't tried the electric one because I was afraid it wouldn't work and didn't want to waste $70 on it. I think I'll take the lid off the can and count how many I have and send them to the Sharpe place. However, I can still buy 5 Fiskar blades at Walmart for $15 +.