The math on using refills is finally getting the play it deserves. Refill formats have been around forever. Concentrates. Tabs. Subscription pouches. Inkjet tanks. Stainless-steel Keurig pods. They were almost always framed around sustainability, right? Less plastic, less waste and fewer stinky trucks on the road. Now something more directly achievable is driving adoption. Across home cleaning, coffee, and personal care, brands are expanding refill systems. Except now it’s in the name of...