It will good if you order the bowls together as set because there is advantage of Cost as well as same model and type you can buy together.
Kitchen Appliances-Bowl Set
There are different variety of material bowl as available in market like plastic,melamine mixing,transparent etc
For US(United States, South America, UK and Europe below bowls sets will be a good option to get it online.
US - Home Appliances,UK-Home Appliances,Europe-Home Appliances
For Indian customers:
The bowl set can freely shipped to your door steps.The transparent bowls are common in Indian kitchen. You can serve different cuisines in same set of bowls.