Five years ago, I purchased a small beta fish and named him Lester. One week later he died.
The following year, I purchased another beta, kept him in the same bowl, named him Dude and had him for about two years.
After his passing, I purchased yet another beta, named him Badass and kept him in the same bowl. Despite moving with him 4 times, having the cat drink out of his bowl, having him be out of his water for at least 1/2hr on the carpet, having him not be fed for two weeks, and having his water almost freeze, he has survived happily for the past three years in his little bowl.
This has taught me that a name is everything when it comes to beta fishes.