De-risking all of these questions is currently one of our top priorities. We have an understanding of a handful of materials that are compatible with our system right now, and we are working to expand that list - and, just as valuably, remove items from that list.

Our chemist is leading these efforts, and she's got a ton of experience from getting her PhD/postdoc work at Yale's Center for Green Chemistry that is helping us properly vet these items out.