Dirty Labs
Dirty Labs' pitch is concentrate-in-metal: a small aluminum bottle of enzyme-based liquid replaces a big plastic jug, with no PVA film anywhere (it's a liquid, not a pod or sheet). The aluminum bottle is the plastic-free selling point; a cap or pump component may still contain some plastic, so it's low-plastic rather than absolutely zero. Formulas are plant-derived and EWG-reviewed.
How clear are their specs?
Names its enzyme/surfactant approach and packaging materials; EWG-reviewed ingredient disclosure.