Check the listing for details. 2X Invisalign Aligner Case -To Protect Your Invisalign Aligners. Condition: New. Listed at 18.88 USD. The 2X Invisalign Aligner Case is a retainer box designed specifically to protect and store your Invisalign aligners. The product is a durable and reliable solution to keep your aligners safe and secure when not in use. With the trusted Invisalign brand behind it, you can trust in the quality and design of this aligner case to effectively safeguard your orthodontic appliances.The 2X Invisalign Aligner Case is a retainer box designed specifically to protect and store your Invisalign aligners. The product is a durable and reliable solution to keep your aligners safe and secure when not in use. With the trusted Invisalign brand behind it, you can trust in the quality and design of this aligner case to effectively safeguard your orthodontic appliances.