fiona14 replied to Adare's topic in Gluten-Free Foods, Products, Shopping & MedicationsMug says clearly at its website that it's gluten-free, and several of you have confirmed that. But what about DIET Mug root beer? I'm not finding anything specific. I had what I call a "celiac attack" 2 nights ago and trying to figure out the source. Diet Mug root beer could be the culprit. Thanks for any info.