This cup does not have heat protection or sleeves, it's just a very thin/cheap paper cup and it leaks. You'll have to place the mouth pieace from the lid on the opposit side of the closed line on the cup so that it faces away. Dispossible cups are convinient, but spilling coffee on yourself on the way to work is not. Don't ever try to reheat your coffee! I microwaved it for 30 seconds, and the cup was burnt pretty bad!!