A bag of lemons.
Here’s how you can keep them around in a more useful form. Grate the rind and freeze it. Take the juice and freeze it in ice cube trays. Finally, preserve the lemons by sprinkling them with kosher salt on the insides and stuff them into a jar. This is a Morrocan technique that keeps them preserved for a year or two.
Three forms of lemon, all the benefits of the fresh version and no waste.