Compare to an extreme example of a market selling one watermelon for 5 dollars, and 5 watermelons for 15. Sure, the latter is a better deal, but I definitely have no use for more than one melon, and the arbitrage opportunity is not worth my time. In the same sense, I and many others do not need more than 1 deodorant at a time and I would rather save my space.
sbarre|3 years ago
Do you live in a microhome? Deodorant sticks are tiny, surely you can store 3 of them under your sink for months without too much suffering.