Scenario A: If someone cooked vegetable soup in a Parve pot and poured it, while hot, into a plastic ben-yomo meat container, and then poured that soup into a dairy pot to re-heat, what would be the status of the dairy pot?
Scenario B: Same case as before but the soup was poured from the Parve pot into the plastic (ben-yomo) meat container while the soup was cold. What would be the status of the dairy pot?
In both cases the pot remains dairy and does not have to be kashered. If the soup was cold the meat container will not give it any taste, and even if the soup was hot, it is still not going to get more than and minute amount of taste from the meat container, and that will not be enough to consider the soup meaty.