You can drink coffee while using Invisalign, but it is important to remove your Invisalign trays before drinking coffee. Drinking coffee with the trays in is not recommended because:

• The heat from hot coffee can warp the plastic of the Invisalign trays.
• Coffee can stain the trays, making them more visible.
• Sugary or acidic coffee can cause plaque buildup and tooth decay if trapped between the trays and teeth.
• Drinking coffee with the trays on can discolor both the trays and your teeth.

The best practice is to take out your Invisalign aligners before drinking coffee, rinse your mouth afterward, and clean your trays well before putting them back in. Cold or lukewarm coffee is less likely to damage the trays compared to hot coffee. Drinking coffee while wearing Invisalign trays should be avoided to maintain the aligners in good condition and keep your teeth healthy during treatment.