For a traditional look for your small goldfish or betta, select a glass fish tank.
Things to Consider:
Safety -- The smaller your tank, the more easily it can be knocked over, especially bowls. Be sure to place your tank or bowl away from high-traffic areas in your home.
Cleaners -- There are specialty glass fish tank cleaners available that will help remove and resist fingerprints and smudges.
Inspect -- Thoroughly inspect your new tank or bowl for any signs of chips or breaks.