Fruit Storage

I don't think I'd store half a watermelon face down, wouldn't all the water leak out? We use tin foil over the top of ours, I'm not sure if that's any greener than plastic wrap or not.

I suppose you could try putting a plate upside down on top of the watermelon.

My mom has actually always just turned watermelons/cantelope/honeydew upside down on plates.  And I can't remember once having something go bad!  But we never really let it sit for very long of course - usually we'd cut into something, stick the other half upside down in the refrigerator, and eat the rest the next day.

Otherwise...you could always cut the fruit off the rind and then store it in Pyrex containers.  It takes a bit of the joy/sloppiness out of eating melon...and it takes a little more work right off the bat. But that way, you're storing less mass in the fridge, not using plastic, and still maximizing your fruit eating.

we do the same thing with mellons in turning them upside down, it's always worked for us, you just keep the plate on it when you turn it back rightside up ;-)