When you're wearing Invisalign to straighten your teeth you should not eat with Invisalign on.
Before eating food or drinking anything you should remove the Invisalign before you do eat or drink.
Eating with the Invisalign on could cause damage to the Invisalign or even cause your teeth to get more crooked and also the food could stain the Invisalign as well.
Drinks such as coffee, tea, orange juice etc could also stain the Invisalign so be sure to remove the Invisalign before eating or drinking.
Then put the Invisalign back in your mouth and wear it for 20 to 22 hours per day to help straighten your teeth with it.