Washing out and reusing glass jars is not only easy, it can be habit forming.
The glass bottles I use the most of are spaghetti jars. They’re great for holding things that I buy from bulk bins, such as popcorn or flax seed. They hold a nice quantity of these products and I find them easier to organize.
Having a baby means that I occasionally buy baby food. Not often, since I make most of mine, but store bought is easier when traveling. And that means baby food jars.
Some people like these for crafts. I’ve given some to my kids to keep some of their smaller craft supplies in.
Larger jars don’t come around too often, but sometimes they’re really useful. The really large pickle jars are nice for holding coins if you like to keep your change until you have a bunch to bring in.
Jars that are bigger than a spaghetti sauce jar but not too big are nice if you like making sourdough starter. I tried this my first time in a spaghetti sauce jar, and there just really wasn’t enough room to work with, even throwing a lot out regularly.
It’s always important to remember that reuse comes before recycle and after reduce in priority. You’re pretty likely to buy some foods in jars. Make the most of what comes with the food and reuse jars when you can. Recycle the rest or find a friend who needs jars.
I save most of my glass jars. I use them for gifts (last year I made bath salts and used glass jars I saved to put them in), I have one holding my dried lavender and many storing food. Easy to clean too!