Charcoal refills are currently included for Mill subscriptions. If you buy your Mill, a charcoal filter that lasts 12+ months ($89 value) is included. Each refill lasts for 12+ months, depending on use.
Our activated charcoal filters utilize 2 million square meters of surface area to absorb any and all odors. Even better, they’re made from upcycled coconut shells, typically considered a waste item.
Your Mill shouldn’t smell. If you’re noticing a vinegar-y smell while the bin is running, it's time to replace your charcoal filter. In the Mill app, you can go to Menu > Device > Charcoal filter to order a replacement.