Also, if the sandwich is wrapped, the container will remain clean for using the next day as well. (fb101.com)
I just put the leftovers in the refrigerator and use them the next day over ice! (kedgotwed.com)
It may sound a bit odd but once you try the leftover curry omelette I promise you'll be ordering extra dishes just to use the next day for brunch! (sewwhite.com)