Name: The Vapur Anti-Bottle
What is it: A 0.4-liter (about 9 ounces) reusable water bottle made of heavy flexible plastic. Actually, it's more of a water bag.
How it works: It's like any other water bottle but with one difference. You put water in it. You carry it. You drink the water when thirst strikes. And the difference? When it's empty, you fold it up and stash it, enabling you to use it another day or as soon as you find a water fountain for a refill.
The good: From a convenience standpoint, the Anti-Bottle has much to offer. It chills easily (the thing is even freezable), it's lightweight (nice for runners), and it can be rolled up when empty for easy transportation. From a green standpoint, you're not adding to the mountain of plastic bottles that get tossed into the trash every day. These also are free of bisphenol A, aka BPA, are dishwasher-safe, and they come with a carabiner for clipping to your pack, purse or belt loop.
The bad: Don't get too thirsty. The Anti-Bottle's capacity may be inadequate for some people. At 9 ounces, it doesn't even qualify as pint-size (We've done the research for you: There are 16 ounces in a pint). The nozzle is likewise smallish, and some customers have wondered if dishwasher soap residue could be left behind and be difficult to rinse out.
Cost: $15.99 a two-pack (they come in three color combinations: blue and white, purple and white, and orange and white).
Where to get it: vapor.us, though they will be available to retailers in January.