well maybe. if you shared a straw with someone who has ever had a cold sore (caused by the herpes simplex virus ) then yes. even if the person had no active cold sore it's still possible to pick up the virus from them. and not necessarily just from the straw -- if you shared a glass bottle or can of soda with a person who has hsv then you could get the virus from them. the odds of getting a cold sore from a random can bottle or glass of soda (that is not a container someone else drank from) is very very small. if you developed a cold sore after enjoying a frosty beverage it's likely you were exposed to hsv some time before you drank the soda and the two events are not related. hope this helps!
can you get a cold sore from drinking soda?