Hotels provide guests with luxurious soaps and shampoos, but generally leave toothpaste out of their bundle of complimentary toiletries. An investigation into why:

“The first and most popular explanation for the missing toothpaste posits the existence of a giant vat—or several giant vats, really—located in the basement of each hotel. These are filled with shampoo, conditioner, and other cosmetic fluids. When the staff needs more toiletries, they tap their kegs to refill the bottles. So why is there no toothpaste in hotel rooms? Because you can’t refill a collapsible tube. One can poke a bunch of holes in this theory of the giant vat, but really one will do: There are no vats of lotion; the hotels buy their toiletries prepackaged, several hundred units to a case.”