Thank you for your inquiry. From what we gather from the question, you were asking about the possibility of HIV transmission through a bottle of water in which you assume has been tampered with in some form.
From the information given, this scenario is determined to be No Risk (HIV transmission is not possible in the given scenario). Although the bottle you have described is considered to be a 'closed environment', there would be absolutely No Risk of HIV transmission to you given you drank from the bottle. If the bottle had contained HIV positive fluid, the consumption of said fluid does not provide a direct access to the bloodstream, a key component of HIV transmission. Enzymes in your saliva and stomach are neutralizing and are not able to carry the virus.
For further questions, do not hesitate to utilize our HIV Transmission Equation, which is a useful tool for determining the basic requirements for HIV Transmission.
Recommendation: No need for HIV testing with the scenario provided. Please refer to a health care professional for other health related questions.
All the best,
AIDS Vancouver Online/Helpline, Cody