Agree with Barn Babe. And Fyi, it's not possible to get a cold sore from sharing a drink b/c the virus has to be massaged in to the skin, but oral herpes isn't an std anyway.
Hi, I doubt that can happen. Maybe if the person had an std, and a sore on their mouth, and you shared the drink... it possibly could be transfered, but most likely you would get a sore you your mouth. Most std's i have read about show up where they entered the body.