My stomach doesn’t deal very well with coffee, then to keep me awake all day I use to drink “Chá Mate”. It’s a very common strategy in Brazil. So I drink “Chá Mate” every day.
Besides that, my favorite brand is “Matte Leão”, because it looks more tasteful than other brands. You can drink hot or cold, both options are good. I prefer to drink it cold with ice cubes and lime slices into it.