Totally sticks up two fingers at efforts to reduce single use plastics, or in this case tetrapaks and what is effectively a coffee cup. And yes, £1.99 is insanely expensive for what it is.
Are they testing how ridiculous a 'more money than sense' type product they can get away with as an example of people's stupidity and lack of forethought?
If someone wants to take cereal to eat on the way to/at work, they could probably get a suitable two part pot, and buy enough cereal and milk to last all week, probably more for that price.