Stainless steel bowls are the common utensils used but there are other alternatives and they include:
Pyrex
Pyrex is one of the most popular brands of glassware used for cooking and baking. Most Pyrex dishes are oven-safe up to 400 degrees Fahrenheit and have been tested for use in air fryers. If you're using Pyrex dishes in your air fryer, make sure that they're oven-safe before putting them in the appliance.
Ceramic Dishes
Ceramic dishes and bowls are also commonly used for cooking and baking because they can withstand high temperatures without cracking or melting. Some types of ceramic cookware are even oven-safe up to 500 degrees Fahrenheit.
If you want to use your ceramic bowls in an air fryer, make sure they are marked oven safe or are safe to use in an air fryer.