What is it?
Another example of the savings that can come from cutting out the middle man, Manpacks offers a streamlined online service. The sole product is a $9 four-pack of five-blade razor cartridges made of titanium-coated steel, with an edge trimmer. The only thing customizable is the shipment schedule: monthly or quarterly.

Does it save?
No doubt, considering name brand five-blade cartridges cost more than $30. The savings are particularly great for the more hirsute among us.

Because it's part of the larger Manpacks program, you can also get convenient regular shipments of essentials like condoms, as well as pseudo-disposables, such as underwear, undershirts, and socks. [From $9 a month; manpacks.com]