"Retianer" is the object that you get after you have had braces. It helps keep the teeth together for 3-4 months. I have to wear mine:
Everyday 24/7 until March
March-Everynight
You keep having to wear it less and less because your teeth won't shift much. The teeth are more tempted to shift more after you get your braces off since they want to go back to where they were to start with.
My retainer is glossy sparkles with red,gold,white,blue sparkles. Therefore, making it more obvious to spot.