Joshi was curious about the package.
"It must be something you haven't lost yet," said Zippy. "You've found it ahead of time before you lost it in the first place."
-Page 75, Yoshi's Paintbrush
How convenient would it be to know ahead of time what you are going to lose? Wouldn't things become much more valuable in the present if you knew they would be lost in the future? Actually, all things, except perhaps your refrigerator and furniture, have the potential to be lost, so we should value all things that we have (and the refrigerator is valuable in its own right, so let's make sure we appreciate that, too). If I think of everything I own as "found" things, I feel a sense of relief about them and they have added importance. But if I am constantly losing things in haphazard piles of random clutter in my home, then maybe I own too many things. The more items you own, the less valuable each one seems, and generally the less distressing it is when one thing gets lost. If we don't value something that is lost, what is the purpose of owning it in the first place?
Food represents this idea quite well. A mint Oreo smoothie is going to taste better if I enjoy it in the present with full awareness that it won't be around later. If I gobble up the mint Oreo smoothie without a thought for it, I might as well have eaten a bunch of plain crackers instead to save on money. It's about putting your money where your values are and appreciating what you have while you still have it.