I live in a house of four CS students in the UK and it is the staple drink at home. It fuels many of our programming sessions. However, we can't buy it in shops

I live in a house of four CS students in the UK and it is the staple drink at home. It fuels many of our programming sessions. However, we can't buy it in shops round here and we have to order it in bulk from the supplier. We probably get through a crate of the stuff every two weeks. I imagine it would catch on in a far bigger way, but no one has heard of it. It was only through a HN article on SoundCloud's Berlin offices that we decided to try some.