Up in the high country, the reusable-shopping-bag trend has caught on, and the Colorado Association of Ski Towns is sponsoring a challenge to spur the use of such bags to lessen the impact of paper and plastic on the environment. Humble Basalt is leading the charge, writes the Aspen Daily News , with Summit County, Granby/Winter Park/Fraser, Vail, and Aspen following. John Miller, who owns grocery-delivery company VailDelivery.com , is doing his part to make Vail a role model for reusables, reports the Vail Daily . He's invested in 2,000 bags and seems committed to using even more when he starts a delivery biz in Aspen this fall. Meanwhile, you don't have to actually spend money on a reusable bag: 5280's Cheap Thrills blog  recently provided tips on how to make your own.