Have we reached peak Christmas advent calendar?

Advent calendars are big business in the world of retail.
These days shoppers expect more than just a square of chocolate inside, with some spending hundreds on calendars that house everything from beauty products to toys and books behind their daily windows. Even pets have their own advent calendars.
They produce bumper sales for retailers such as Harrods, Boots, and Net-a-Porter. Department store Liberty even called out its record beauty calendar sales as factor behind its growing profits last