Your organics must be bagged before you place them in your organics cart. Acceptable bags generally include BPI-certified compostable plastic bags. Some programs also allow you to use Kraft paper bags.
BPI-certified compostable plastic bags may be provided by your hauler, or they can be purchased at most retail stores, grocery stores, or online. If you are purchasing your own, you may want to try different brands to find what works for you - they will all perform differently.
Check with your hauler to see what items need to be bagged for your program. Some programs allow you to put larger items like pizza boxes from delivery and paper egg cartons into your cart without being bagged.