This is an educational game which also includes a few puzzles.

The large numbers represent the sizes of the jugs in liters.
Click the numbers to change the size of the jugs.
After the first pouring of water the sizes cannot be changed anymore.

Click one of the top drops to fill a jug with water.
Click one of the bottom drops to dump the content of a jug into the drainage.

To pour water from one jug into another, click the top of the water level in one jug and move it across to another jug. The second jug will always get filled to the rim. This makes it a bit tricky to create certain amounts of water.

Variant 2 is an example of a puzzle which has been created with this Jugs Game: Get one liter or four liters of water by using only the 3-liter jug and the 5-liter jug.
The other variants contain similar puzzles.

Note that variants 1, 2, 3 will not notify you of a win because they have more than one objective.

 
More freeware as well as real puzzles and games at my home page http://karl.kiwi.gen.nz.