This is a genius idea. I probably should have thought of it.
I was browsing old blog posts (as I am far behind reading anyone’s blog but my own lately) and I found this little gem via notmartha. When you have extra lemons (and I always seem to have at least 8 extra lemons when I buy a bag of them for something), cut them into wedges and put them in the freezer. Next time you’re having a glass of water or tea, just pop one in your glass. You get the lemony flavor and the cooling properties. I love it.
Plus, if you really needed a lemon to cook with you could probably thaw a wedge or two or nuke it for a few seconds.