In the Flipdish Portal, you can specify that a product contains alcohol. 

Navigate to that product's page in your Flipdish catalog and look for the "contains alcohol" checkbox. 

When this checkbox is enabled, your customers will be prompted to confirm that they are over the legal age, and that ID may be required. Please note that to fully enable this functionality, contact help@flipdish.com. 

To learn more about Flipdish’s products or how to grow your online business enroll for FREE in the Flipdish Academy here:http://academy.flipdish.com/