none, sorry.
bettas need HEATED water to be healthy, that means at least 2.5gallons.
goldfish get huge and are messy. they need big tanks with heavy filtration.
bowls are for cereal and soup, not living things. if you want fish, get a real tank, not a bowl. other wise fish are not the right choice for you. they are living things that have requirements to be healthy, they deserve to have these requirements met just as much as any other pet. not providing for these needs is CRUELTY,