I have the same question.
I searched real quick—it looks like you put eggs in a ziploc bag, optionally with veggies or other omelet ingredients. Close the bag and dip it in boiling water for a couple minutes. Then you end up with sometime like an omelet or scrambled eggs. Honestly I’ve never seen that at a hotel breakfast.
But I’d still like to know what OP means
They should have said “liquid eggs” because that’s really what they meant but food service packages are often in bags as opposed to the consumer style cartons.