I think it was Lipton Soup Secrets the boys used to flavor their stew at camp. DH let ds use it because it had a very detailed allergen label. He brought the label home...it was very good. I don't rely on a good label usually but I was impressed.
Yes I don't usually think about avoiding shellfish. I don't know if it's really an allergy, and when you don't eat out or eat seafood, that one's easy.