Great idea. Be sure to label flat, matte, semi, etc. I am painting my apartment as we speak and have nine different paints I am juggling some of which are the same color, just different finishes.

I am a jar hoarder for this specific reason, as we're in the midst of a remodel. Plus - you can store stain this way too. I've spent the last 3 days staining wood wainscoting in my living room, and the leftovers have gone right into labeled jars. Love it.

thanks for the tip. i've been redoing our bathroom and was worried about the paint drying out. i'll have to give this a try.

I use old peanut jars for this. They take up a lot less space than most paint cans. Be sure to include the drying times on the labels.

I also use plastic wrap on the mouth,so no paint sticks to the lid.

Yes saba, I use the additional plastic wrap, too.

Storing these jars upside down prevents any air intake. Store them cool and dark.

I just did this a few months ago. Every room in my home is a different color so I went and bought a case of mason canning jars and cut my paint storage space in half. It is so easy to also narrow your search for a paint to do any touchup because you can see the colors. I appreciate the tip about using plastic wrap too. For smaller amounts of paint I also use jars I've saved.

This was talked about earlier this year on AT and people just complained. I have no idea why. I stole the idea myself:

http://www.flickr.com/photos/jendavid1000/4163948114/

I actually did this recently and worried whether it was really a good idea. I was afraid the paint might degrade the rubber seals.

So I'm super happy to know that it works and I am going to convert all my paint storage to jars.

I've also thought about using empty plastic laundry detergent containers - it would be useful to be able to pour the paint out. But, again, I don't know how the plastic and the paint would interact.

I've done this with a large (quart) French's yellow mustard jar; perfect because it is a glass jar with a plastic lid, so I don't have to worry about the paint reacting, nor about the lid rusting. I would imagine covering the top with some plastic wrap would be even better to keep air out.

What makes it especially nice is when you patch a nail hole or ding in the wall just grab your paint jar, shake it a bit then cover the patch with the matching paint using a Qtip. No paint brush and you just throw it away. I've done this lots of times and it's such a simple fix instead of the big deal brushes and paint cans are.

I just use tupperware...