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.

Highlights:
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]