costa coffee free to schoolchildren?

I have just found out that Costa Coffee has been visiting my daughter`s state school every Thursday and giving out free coffee. I find it quite worrying that this company can get into out schools and start targeting our children at such an early and impressionable age, and wondered if anyone else things that this is unethical? She is twelve and has been given the coffee for free. I`m not sure if it is decaf or not, but the school did not ask for parental permission.