Re: [math-fun] Hot tea sucks.

Blow hard into the top of the container, and quickly cap. The air in the empty portion should then be around 98-room temperature and heat up, rather than cool. I used to keep a cocktail shaker with ice in the freezer, and when adding room temperature liquor and shaking, the opposite would happen. Blowing into it gave a nice seal upon shaking rather than the top popping off.