If you're storing gases or moving molecules of medicine in the body, you want to make sure that the molecules stay in the metal-organic framework (MOF) you put them in.
@MIT
researchers have identified 10,000 possible MOF structures that are ultrastable: https://news.mit.edu/2023/scientists-computational-modeling-design-ultrastable-materials-0404
https://twitter.com/doescience/status/1650525780856717313