I keep the boxes for the cat. Put his bed in a lower box, and stacked a box on top that faces up so he has a hiding perch. We call it his catdominium.

I keep the jars for myself, and when I ate canned soup last night I really had a hard time deciding whether or not the can would be a good pot to start plants in. So it has not gone into the trash either. (I asked the county for a recycling bin.. but after more than a year, it hasn't shown up. I assume because I'm renting place)