Thank you for your inquiry. From what we gather from the question, you were asking about the possibility of HIV transmission, given a person living with HIV had opened your bottle of soda (with the possible presence of blood).
From the information given, this scenario is determined to be No Risk (HIV transmission is not possible in the given scenario).
In the scenario above, it would appear to be highly unlikely that the person who had taken your soda would have been able to deposit HIV positive fluid into the bottle. Despite this, the consumption or ingestion of HIV positive fluids would not warrant a risk for HIV transmission.
Recommendation: No need for HIV screening for the scenario provided. Please refer to health care provider for additional health related questions.
All the best,
AIDS Vancouver Online/Helpline, Cody