Weight loss pills / drink crystals?

I'm 16 and weight about 130. I know that's not very bad for age/weight. I'm not very tall, so I want to get drink crystals (to put in water) or diet pills to help me lose a bit of weight. I don't want answers telling me not to do it cause I'm too young or anything, I just want to know which ones would be recommended (Iast year I had the slim quick drink crystals, and it would kind of fill me up so I wouldnt eat too much). I'm looking for something that costs under $100 and that you can get at lawtons/shoppers/etc in Canada. Thanks