At the moment, it is rather hot and humid in Germany and it is kind of hard for me as I am entering the last weeks of the pregnancy. A delicious way to cool down is this quick milk shake:
1 banana (can already be a few days old)
a handful of deep-frozen berries out of the freezer (e.g. raspberries)
a large glass of milk (how much exactly depends on what consistency you prefer)
Mix all the ingredients with a blender and enjoy! :-)