Yes! It is theoretically possible that you can get herpes from sharing a drink but it is not very likely.
You can get Herpes Simplex Virus 1 when you share a drink with a person who has cold sores with an active virus, which has been contracted recently, at the moment when you are sharing it. The reason why the probability of catching the virus becomes minimal is because it cannot last for more than few seconds on any object such as a glass, tumbler or a utensil.
The chances of contracting the virus will be much less when compared with something like being kissed on your mouth with a person who has a fresh cold sore.
Research was conducted at the Medical Center of the University of Maryland and it revealed that Herpes Simplex Virus 1 can spread as oral herpes through sharing a drink or utensils. It is technically possible to get herpes from a person with whom you are sharing a drink directly or through straws out of a glass or a utensil.
The herpes virus will spread through the saliva and sharing a drink or kissing will make it likely for a person to contract the virus. At the same time, it is difficult for the HSV-1 Virus to stay active outside of the body or skin cells for anything that is over ten seconds. It is, therefore, less likely to get oral herpes from a person with whom you have shared a drink or eating utensils. It only becomes possible when there is some amount of saliva left on the portion of a glass when you share a drink or on the straw which is being used. If you drink immediately from that very same portion of the straw or the glass, you may come into contact with that saliva. There is a possibility of the oral herpes virus getting transmitted once the saliva gets transferred.
Chances of Contracting the Virus are Less From Sharing a Drink
There is no need to panic when you have shared a drink with a person who has the HSV-1 Virus. The chances of contracting oral herpes when you share drinks are lesser than when you are kissing that person on the cold sore areas on the mouth. This is because the amount of the saliva that is transferred when you share drinks is much less than what can be exchanged when a person is kissed. The virus that is present in the saliva after settling on a glass rim or on a straw will start to fade when it is not active. Another factor which makes it less dangerous during sharing of drinks is that a person who has oral herpes may not have a contagious virus unless the cold sores are recently contracted.
It is possible, in theory, to contract oral herpes by sharing drinks but it is least likely.