I've been slowly reducing my kitchen waste by using jars and shopping in bulk - haven't put anything in the trash for 4 days now, a new record!
One thing I miss though are plastic baggies, for storing diced onions, half a lemon or tomato, etc. I suppose I could put them in a jar, but that takes a lot of room and also leaves quite a bit of air in contact with the cut produce. I really prefer the plastic bags where I can squish all the air out and end up with a very small item. Any ideas for reusable substitutes for small ziploc bags?
This may sound crazy, but I sometimes just turn the tomato or lemon upside down on a lid or plate...covers the exposed portion. You can sometimes find small glass containers that are square that have lids. Haven't seen them in a while but you could find them online.
You can buy some little plastic stretchy covers (they look like mini shower caps) for covering miscellaneous small food items. I put half an onion, or small leftover in a glass ramekin and then cover with the little stretchy cover. They are still made of plastic, but are reusable MANY times. If needed you can wash them gently. They are available through the Vermont Country Store in a set of various sizes. I found mine in my local hardware store.
I use the "cut-side-down" method as well, particularly for half a watermelon.
I am also discovering that often a plate will fit over a bowl (large plates for large bowls, dessert plates for smaller bowls) in lieu of a lid. And a second plate can sit upside down over the original plate if saving, for instance, someone's dinner.