system
Given the following post, respond as if you're commenting on Reddit:
human
Hi, are there non-lattice solids? My physics textbook mentions most solids are in a crystal lattice.

Are there non-lattice solids?
gpt
To the answers given here (glass), I'd like to add polymers. It's a completely different type of solid material in the way it's made  from interconnected long chains of repeating molecules. While some polymers do crystallize, it's a very different type of crystal from what you would find in metals or elemental cristals, and a lot simply remain amorphous.