It went beyond entertainment. Fresh Prince managed to present the black experience in America to a wide audience and opened up conversations in living rooms that might've otherwise never happened. In that way, I'd say it was groundbreaking.
Half air you say? Are you positive? Because sometimes that space is needed to stop the liquid from splattering everywhere when you puncture the seal. Still... if it's half air then that's messed up. Could be a manufacturing error too, you never know.