Due to the overwhelming reaction to the first instructable, here comes model II.
it has even fewer parts, it is easy & super cheap to build.
Can be used to lift gasoline, but please be careful for fire hasard.
List of parts;
A 3/8 inch or 10mm hose
a 4mm air hose( this hose should be longer than the 3/8" or 10mm hose)
an aquarium air pump for short hose (6foot)
or compressor ( far away)
Step 1: Slip the small into the big hose
Stop about 5 cm or 2 inches before reaching the end of the big hose.
Step 3: Voila
Just make sure the end of the hose is not floating on the water.
Tie something heavy (mother in-law?) to the end of the hose, so it will stay under water.