This wasn't a money-saving exercise, though it ended up that way, and increased independence too, so I figured this community might like reading about it. I hope a few might also try it out. It's easier and more educational than you'd expect.
I decided to go for a week buying no food with packaging I had to throw out -- no boxes, no plastic containers, no rubber bands holding the broccoli together, etc. I ended up going for 2.5 weeks and loved the experience. Now, about six weeks since I started, I'd say the experiment created long-term changes in my eating. Canned food seems increasingly weird. Like, what's the melting temperature of aluminum and why should I pay someone to make a can for me to eat a few beans?
I wrote up the experience for those who want more background or pictures.
After thinking about trying it for a while, one day I just decided to start. I wasn't trying to make a perfect rule for myself, since shooting for perfection was holding me back from actually doing it. I planned to use the experience to learn how to do it better the next time.
I allowed myself to finish packaged food I already had and to fill bags I brought to the store. I found the experience easier than I expected.
The result saved more money and time than I expected and taught me more about food than I expected. Some examples:
- My garbage production dropped to almost nothing, a bigger drop than I expected. I think my compost production stayed about the same.
- I saw yet more ways how much food people throw away and garbage they produce. More precisely, I saw how much I threw away, and I take responsibility for my behavior.
- People I told about it liked the idea. It made for interesting conversation without the usual questions I get about where I was getting protein, etc. when I say I don't eat meat.
- I bought and ate closer to the plants (and fungi) than ever.
- I made a habit of soaking new dried legumes when I almost finished the last ones I cooked, which made it easy. I ate a lot more beans than before.
- I went to my corner produce guy and bulk food store more than ever.
- I started looking at packaged food as less appetizing.
Anyway, I recommend trying it. I thought I'd struggle for the week, but ended up finding it easier with each day. I expect it will change my shopping habits for the long term.
Good luck if you try it yourselves!