Most peppers can be grown in containers. If you don't care to eat hot peppers, try container gardening just for the beauty of the colors.
Left pic is a mini Thai plant. Mine reached about 2ft. in diameter. You can control the size of your plant by the size of the pot. The smaller plants in pic #2 are controlled in size by the smaller containers.
The link is a pic of ornamental peppers with varegated colors. I've grown these in the past just for color and they're quite easy to grow.
Twilight Chile Seeds