Final answer:
The collar is used for safety and minimizing messes when preparing custard treats. It acts as a protective barrier to prevent boiling over or spilling out of the container. It can also help insulate the container and keep your hands from getting too cold during blending or stirring.
Step-by-step explanation:
The collar is used for safety as well as minimizing messes when preparing custard treats. It acts as a protective barrier to prevent the custard from boiling over or spilling out of the container. By placing the collar around the rim of the container, you create a space that allows the custard to expand without overflowing. Additionally, the collar can also help to insulate the container and keep your hands from getting too cold during blending or stirring. This is especially important if you are working with frozen custards or using an ice cream maker that requires continuous stirring. The collar is not a lid used for to-go orders, as mentioned in option C. Instead, it is primarily used for safety and reducing messes, making option D incorrect.