A free app for Android, by BigPanda Studios.

Sort Em All — Water Puzzle is a classic and addictive tube-sorting puzzle game that will test your brain. You will need to use mad logic and strategy skills to solve the puzzles!

Tap the tubes and pour the water into another glass or tube to merge them. But, be careful, as you have to think about each move you make carefully, or else you will have to undo a lot of moves. Don’t worry, though, as you can always use a hint when it’s available. Or, when push comes to shove, opt to restart the level instead.

The goal of the game is to get all the same colours in their respective, individual glasses.