That is a good run, I love runs int he 15-16m range. Anything over about 13m I take a hydration belt and a gel pack or 2 which i don't always take but it is useful training to get your body used to consuming gels. My Neighbor never took any gels in training, he ran with a club that organized weekend long runs and put how some haribo, coke and fruit pieces which is all great until you run marathon and drink poweraid and consume gels. He felt so sick and got very dehydrated. This time round he is training a lot consuming fluids and sugar sources, trying to find out what he can stomach.