Shizuku [Movie]

A man adrift on the sea finds three drops of water on his raft’s mast. He desperately tries to get at these drops to quench his thirst, but they will not fall into his mouth. This is a simple animation with a gag theme, just like the chasing in “Tom and Jerry.” It is one of Tezuka Osamu’s independent films, made in no more than a week. He even drew all the backgrounds himself.

From:
http://en.tezuka.co.jp/anime/sakuhin/ea/ea005.html