Single Dose Hopper and Blowing Bin for Coffee Grinders Compatibility and convenience: The single dose hopper is compatible with various grinder models, providing consistent dosing across different setups. Clean and collect with ease: The blowing bin has a 140 g capacity, designed to effectively clean and collect excess coffee grounds for a tidier workspace. Simple, sanitary operation: Press the bellow to add a coffee dose to your grinder, while simultaneously pushing out remaining powder from the internal gear to maintain a clean interior. Durable, comfortable design: Made of silicone with a unique design alloy lid, the setup offers a comfortable hand press experience. Use scenarios Everyday home use: Quickly dose a precise amount into your grinder and keep the interior clean between batches. Small batches or multigrinder setups: Streamline switching between grinders or bean types with a single, repeatable dosing method and easy cleanup. Travel or compact setups: Lightweight and portable, suitable for keeping a tidy, efficient coffee routine on the go.