MD needs a disposable razor.
EDIT: which apparently Americans dont understand the concept of.
The idea off a disposable razor is that you buy a handle + blades. After time the blades become blunt and you need to throw them away and purchase more blades. The handle is normally a one off purchase and for the majority of companies its a loss leader (meaning they sell it for cheaper than they buy it for). The blades are the item that the user keeps coming back to buy. The item isnt needed, you can easily get by without shaving your face, but most people do. Its also a futile attempt, since hair grows and you will need to shave again.
The idea of having a disposable razor is a product that the consumer keeps coming back and buying, because they feel they need to, without it actually doing anything useful in the long run at all. Items in the temporary shop do this some way but from discussions i have had most people dont use them/only use one to get to the other items in that branch.