Came across this hockey mat which is on sale at 123-Hockey. Website is in Dutch but I think you can see what's the objective of this mat. I actually had thought to do something similar for my U11 players at the start of summer so that they can take it at home and practice. I love the idea where the mat can be portable and the design of the lines help to make the 'drill' interesting. The only thing I don't like is the price, at €700 per 2mx2m I expected a bit more (shipping not included). It says that the material used is comparable to a normal water based pitch. Is that even possible? Looks like they are going to do an app for it as well: Personally, it's a nice idea but a bit over the budget.