I've seen reusable straws in the past: plastic, curly straws that promised plenty of fun but actually wound up looking like something I wouldn't want to drink out of after a while. The Glass Straw, from Glass Dharma, however, is both environmentally friendly and something that I can keep clean to my satisfaction. The straw comes in a variety of sizes and decorations, from a "shorty" straw that is 6 1/4 inches long to a straw decorated with glass dots. Glass Dharma also offers each of its straws in different diameters; you don't have to worry about your extra-thick smoothie getting stuck in one of these.
The Glass Straws are made from borosilicate tubing and annealed to specifications provided by Corning, guaranteeing that they are safe for use with food. Glass Dharma also offers a lifetime guarantee against its straws breaking. The prices for the Glass Straws may seem a little high when compared with disposable straws, but remember that you can get a lifetime of use out of these straws. They range from $6 to $12 each. Glass Dharma also sells carrying cases for the straws, as well as cleaning kits that can help guarantee that you get your straw clean between each use.