I have a stock item that I tend to provide periodically (usually when I know there's a boss fight and no sane way to rest and it makes sense to provide them; they can be bought in some areas):
Potion of Apprentice's Friend
Common potion.
This potion takes one minute to drink. After having been drunk, the user receives the benefit of a short rest.
Special: For every such potion drunk after the first since completing a long rest, the drinker must make a Constitution saving throw with DC = 10 + 5*number of these potions drunk since the last long rest. On a failed saving throw, the drinker also gains 2 levels of exhaustion.
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What are these potions? Basically energy drinks. On meth. Think dark black coffee, juiced with massive quantities of both sugar and methamphetamines. Heroes are strong stuff, so they can survive one of them just fine. After that...bad things happen. Basically, it's a shorter time cost catnap scroll that anyone can use...at a price.
And yes, they can stockpile these to some degree--if only 2 people need short rests and they have 4 available, they can save some for later.