You go to sleep one night, 10:00pm as usual, but strangely enough you wake up in a dim lit, stone brick room, where before you sits a man. The man is on a small stool beside a table. On the table is a bucket.
"Hello there, he begins with a smirk, and welcome to dreamland".
"If you wish to ever leave this cold damp cell, you must first answer my riddle, beside me here is a 10 Galleon bucket of water, what can I put in the bucket to make it way less? I am not allowed to take it out with my hands or drink it out with my mouth."
Answer my riddle.