You now have something to put inside the bear, so STUFF IT! Use the Clue Below to Help You Enter the Final 8-Digit Lock Combination. Finally, the water level in a reservoir is low but doubles every day. It takes 60 days to fill the reservoir. How long does it take for the reservoir to become half full? Can You Unlock Your Box?Please Wait... Your Message Has Been Submitted. Something is wrong with your submission.