Message in a Bottle

One day, Grandpa and the kittens are standing on the shore, and several bottles wash ashore next to them. Grandpa says that once he found a bottle with a message that turned out to be 300 years old and promised the kittens that they would go to the museum to see it. While Daddy and Grandpa go fishing, the kittens decide to send a message in a bottle too, for cats in the future. By chance Daddy and Grandpa fish out the kittens' bottle. They explain to the kittens that throwing things into the sea is a bad idea. The kittens learn it's much better to leave a clean planet for the cats from the future!