Growlers, those familiar glass jugs that allow beer-drinkers to take their suds to go, have been around for as long as, well, for as long as people have been drinking beer. But 64-ounce modern growlers can be unwieldy and impractical, and that often let beer go flat within a day. Enter Wit's End Brewing's stainless-steel forty-ounce canteens. You can buy one for $20 (including your beer) and refill it whenever you want for $9. (Between fills, you can use it for water or whatever other liquid makes you happy.) A heavy-duty o-ring should keep the beer fresh for at least two weeks. "And besides," says brewery owner Scott Witsoe, "we couldn't pass up on the irony of a craft brewery selling beer in forties."