It doesn't take much to make me happy.
I was putting away the dishes, getting ready to wash some more, when I dropped the lid to a small yogurt container into the sink with the garbage disposal.
Now let me say that I'm not enthralled with garbage disposals. In the bigger picture of things, they're pretty worthless. I compost everything I can and what I can't will go into the garbage if it's solid or down the sink if it's liquid.
Since I don't have a dog or cat any more, meat scraps are either frozen for later use or put in empty cans or small boxes and put into the trash. So you see, I don't use my garbage disposal often.
As a matter of fact, it's a problem for me because I have to be so careful to keep things from falling into it. I have/had a plug for it, but that kept the water from running through... so imagine my delight when that yogurt container lid slipped perfectly into the drain and sat prettily on the rim. I tried it; it works beautifully. I can fill the sink with flatware and never worry about it slipping down the drain. And the sink drains slowly so I don't have to get into the water to remove the lid.
How is this frugal, you might well ask... well, if I hadn't saved that yogurt container (my daughter's, I don't buy it, except the plain now and then), I wouldn't have had the lid. And if I wouldn't have had the lid, sooner or later, I would have wound up looking for and buying something to do the job.
I don't know how much I save by using a plastic lid instead of a drain plug, but it pleases me. :)