Product Consistency: The soft, creamy nature of deodorant balms is the biggest design driver. The container must:
Prevent "Swivel": The platform must form a very secure seal. If there's a gap, the soft balm can be forced downward ("swivel") into the mechanism when pressure is applied during use, rendering the elevator mechanism useless.
Withstand Temperature: Balms can melt in high heat. The container must be able to hold a slightly liquefied product without leaking.