Invisalign Cases (Pre-order for 1 week)Aligner and Retainer Case. This slim modern Invisalign case now comes in white, black, blue, pink, purple, green, mint. The case keeps your Invisalign aligners and Vivera retainers secure at home and on the road. A magnetic closure ensures the case is securely fastened. The textured liner helps to minimize slipping and moving inside. Spacing behind the hinge allows for ventilation.