Hinged door funnel opening for boxes to pour stuff

thingiverse

My first upload here, a simple design that I wasn't able to find. I have a big container for my cat's literbox sand, it has a lid that you have to take off. With this thing you can make a whole in one of the container's walls and simply pour the sand into the litterbox without taking off the the lid. Opening is 10cmx5cm and you need to make such hole for it, of course you can rescale it.