Putting fish in a bowl is just putting them in their deathbed.
You should be keeping your fish in a cycled and filtered tank, possibly heated if you are interested in getting a tropical fish.
For bowls, you will need to be doing a 100% water change twice a day, whereas in a tank, you should be only doing a 25% water change every week. You see how this is stressful, and can kill the fish.
No fish can live in a bowl, as there is such a tiny surface area for the oxygen to enter and circulate throughout the water, that there is really no point in keeping any living thing in a bowl, even if it is a snail, which is the only thing you CAN keep in a bowl.
Keeping any fish in a bowl causes it to be stunted in growth when older. People say that fish grow to the size of their tanks, when in fact this is untrue. They continue growing, except stop when they grow too big for their tank, because the size of the tank has stunted them, which means stopped their organs/bones to grow, which kills them.
It is our duty as fish keepers to keep our friends in the best possible conditions for their health and happiness.
Buy a Betta fish. These are lovely, very colourful fish, as well. You can get a 5 gallon tank with a filter, a heater, gravel, live plants, etc, for under $50 if you're lucky. But you need to cycle the tank first - read the article below on cycling tanks.