The BACTrack Vio keychain breathalyzer and app on the iPhone at NPR headquarters in Washington, D.C. A public health researcher says tools like this could help people make better decisions about alcohol use. Meredith Rizzo/NPR hide caption

itoggle caption Meredith Rizzo/NPR

New regulations on what can be called "Tennessee whiskey" have sparked a fight between the makers of Jack Daniel's and George Dickel, two best-selling brands. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Singer Ke$ha performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas in September. Ethan Miller/Getty Images hide caption

itoggle caption Ethan Miller/Getty Images

High school students whose friends posted photos of drinking and smoking were about 20 percent more likely to become drinkers or smokers themselves. iStockphoto hide caption

itoggle caption iStockphoto

An ad for Vampt's Lean Machine "recovery ale," which will be marketed as a sports drink later this year, if funding allows. Researchers say drinking beer after working out has some advantages, but there are big caveats. Courtesy of VAMPT hide caption

itoggle caption Courtesy of VAMPT