I am sure there are many, if not most, that have not heard about Freshness Rings. This is one of my newest additions to my kitchen supplies. These rings are awesome. I use half a lemon every morning and I used to get a piece of plastic wrap to put on the other half. This ring keeps the cut edge moist and almost as good as the first morning. The membrane that the fruit sits on is quite flexible and the size of the lemon makes no difference, including when there is a pointy stem end. They are like little drums.
The apple in this picture has been in the fridge for a couple days without rubbing any lemon on it to stop it from browning. My avocados do start to turn a little brown after a couple of days, but none of the fruit appears to dry out. Of course I don't usually leave an avocado in there more than the next day.
This is the 4th ring... it is orange and it currently has an onion in it that I forgot was in the fridge. The onion looks like I just put it in there yesterday.
I bought my Freshness Rings on Amazon