Best thing if you’ve eaten something hot: raw tomato. The small flavourful cherry tomatos or whatever are the best, ordinary tomatos work, but not as well.

I had an advent calendar one year with spicy candies in it. No problem trying out the crazy ones. Just had to make sure to have a few cherry tomatos close by, and the heat was gone in a few seconds. Milk, yogurt or whatever, does nothing in comparison.