Advent calendars have evolved from the simple cardboard doors or chocolate treats to a multimillion-dollar premium industry; with major companies using them as a powerful brand awareness tool.

We find out why the design of an advent calendar is more important than ever, with many retailers investing in appearance and reusability; and we hear from environmental groups who are still concerned about the amount of waste.

Plus - are the products in these more extravagant calendars actually worth the money?

(Picture: An apartment window decorated with advent calendar and traditional electric Christmas candlestick. Credit: Getty Images)

Presented and produced by Deborah Weitzmann