"If you want a sign, you may request one from the replicator. Otherwise we will need someone to learn how to blow glass into the right shape first and foremost." It's a casual reminder that making something requires to make its parts as well.

Though it's something to muse around about while Jon starts putting the pieces together "Glassblowing certainly is a skill that isn't entirely without use. Or producing glass pieces in various shapes in general. Maybe an option for you to consider?" Yes, he is half-joking. Cayde may be lacking the actual lungs for such a task.