I've got for Secret Santa the best and most famous four Spanish invents:
-Bota de Montaña (... "Mountain Boot"?)
Very useful to thirsty people or lover of wine in the mountain with diamonds. From my uncle.
-Botijo.
The same, but water in stead of wine. From my uncle too.
-Fregona (also known as "Mocho", or "Palo de Fregar")
Useful to clean the rooms, but it gets tired a lot. By experience. Buffff...
From the last party, I simply took it lol
-Gañán.
Useful for nothing but bothering and disturbing urban, smart and technologic people.
From my brother, every new year more gañán than the last one.