In the past half-decade or so, chances are good that you've seen at least one S'well stainless steel bottle out in the wild, and more likely at least a few dozen. These things are everywhere.

It could be because their double-walled, vacuum-insulated construction keeps drinks cold for 24 hours or hot for 12 without breaking a sweat, so to speak...but that sort of functionality is pretty common nowadays. My guess is that it has something more to do with the fact that they've got more colors and pattern styles than you can shake a stick at. They don't just get the job done, they do it with panache. (The four styles pictured above are but a fraction of the options available.)

These fashionable bottles come in three sizes:

1. 9-ounce — Ideal for morning coffee or enough water to get through a workout. ($25)
2. 17-ounce — Nearly twice the size, yet still able to fit into a typical cup holder. ($35)
3. 25-ounce — Big enough to hold a bottle's worth of wine. ($45)