We are fortunate to have a community garden spot about 100 feet from the office to receive the composted material, but the compost could also be spread on the lawn and around shrubs. A few willing packers take turns emptying the bucket into the compost bin every Friday afternoon. A wire basket or box will work. Carry the bucket out to the compost bin every Friday afternoon or more often if you prefer. Rinse out remaining grounds and pour the water into the compost bin also.
Moisture speeds decomposition.
It is best to have a deep utility sink or frost-free faucet outside, but a few wet paper towels also works well. It is as simple as that. A wood box works, but is heavier when it comes to retrieving compost out of the bottom. Our gardener tills it into her spot in the spring. To collect the material to be composted, we use a detergent bucket that is short, but fairly wide making it easier to get the grounds into the bucket.