The red cups are still here! Starbucks branch in SM Lanang is still using red cups until now. Last year from what I recall they stopped using the red cups as soon as they planner promo ended as well. This year they extended the use of these particular cups.
There was another branch who had little supply of the red cups even before their holiday drinks promo ended. While this branch continues to use it until supply lasts. They even still have the Toffee Nut Latte drink which is a holiday drink. It is not in the menu anymore but they sometimes offer or recommend it to the customer ordering drinks at the counter.
These cups could also pass as cups to celebrate in time for Valentine's Day in a couple of days or for the recent Chinese new year.