Don't worry we'll give you some hints...
You are all invited to send your answer by inbox and not as a comment.
The first 5 persons to guess will win à T-Shirt, here the link to our Shop
HINT N° 1 - It's no just 1... but 2 big BIG presents.
Santa will be delivering them in our headquarters ahead of time, next wednesday (13th of December). Yeahh!!
HINT N° 2 - It will allow us to grow delicious edible mushrooms in the best conditions of hygine, using nothing more than agricultural biomass, brewer's spent grains, coffee grounds and some mist.
HINT N° 3 - We will be able to upcycle tons and tons of wood, cardbord and other ligneous and cellulosic wastes in low tech and in soilless mycelium culture, to develop byproducts and eco-biomaterials.
Have you solve the mystery question?