The Tubbi Knock Box from Cafelat is made of black plastic and has a height of 15cm on the high side and 11cm on the low side. The Knock Box has a sturdy crossbar made of rubber-coated steel. The container has a diameter of 16,5cm. The plastic part of the knock box is dishwasher safe.
This is the bigger version of the well known Tubbi Knock Box. With the capacity of 40 coffee grounds, you don't have to empty it regularly.