Can I drink the milk in Thailand? Well I can not really tell I would stick to Soya mil for a while and try to eat milk imported from Australia or something because they have a good value and that milk is somewhat safe.
Even if the Thai producers have not been found to dangerous the milk yet the Chinese companies are always trying to dump the milk some where and one of the first countries is Thailand. The customs already taken tons of dried from china and god knows how much had come in already.
So if I were in yours shoes I would stick to the Soya milk for a while until the milk scandal passes and all the dangerous milk is finished.