There are some single-use products that we rely much on but can’t be safely or practically recycled, reused, or repurposed—things like diapers, air filters, and menstrual products. Sure, there are reusable alternatives in some cases, but those aren’t always the best option for everyone.

Tom Szaky, CEO of TerraCycle sees value in this trash.

Something like a child’s diaper holds enough poop that—if collected and properly processed—can be sent to a lab and analyzed, providing insight into the gut biome of kiddos. That’s why TerraCycle, the company behind Loop and other initiatives like the Taco Bell sauce pack recycling program, whose mission is to recycle the unrecyclable, has recently launched its fourth division, TerraCycle Discovery. The first product under Discovery is called Tiniest Biome, and they collect kids’ diapers and send them to a lab for testing, providing parents insights and suggestions based on their kiddo’s (literal) crap.