jax hubbard is a nutritionist. hi, jax. >> hi, there. >> jax, are all drinks created equal? >> absolutely not. the two big things to be concerned with are sugar and caffeine. caffeine makes you jittery, and contrary to popular belief, less alert. it also can cause headaches. sugar is just downright unhealthy. in addition, sodas and other sweetened beverages can really pack on the pounds. >> what about energy drinks? >> those can be full of sugar, too. get energy from food instead. drinks should be for hydration. you even need to limit juices and sports drinks. >> well, gee, what's left? >> personally, for me, there's nothing better than a nice, tall glass of water. since teens need lots of calcium, think low-fat milk. seltzer and club soda are good options, too. >> it's been said that we are what we eat. when it comes to beverages, i guess you can say, "i drink, therefore i am"? >> ouch. was that a sip of the tongue? >> "ouch" back at you. anyway, thanks, jax. with "health bites," i'm ellie. >> not far from where the baltimore orioles play ball, there's a museum dedicated to