Is It Safe to Drink Flavored Sparkling Water with Invisalign Aligners In?

Invisalign aligners can act as bleach trays to whiten teeth.  They can also do the same action to hold onto beverages consumed while wearing them.  Anything other than water will have a different pH and have other things such as acids that would break down tooth structure.

It is best to only drink plain, non-carbonated water with invisalign in your mouth. Flavored and sparking waters have acids in them which can seep under the aligners and sit on your tooth surface and eat away at your teeth and cause cavities.

The major issue with sugars is that they can be broken down by various bacteria and result in acid production.  The ingredients in flavoured waters have acids in them that can change the mineral content of your teeth in an undesirable way.  In order to avoid decay, it's best to avoid anything other than plain water.