About This Convenient Coffee Grounds Collection: Our espresso knock box is designed to efficiently collect used coffee grounds, saving you trips to the trash. Plus, these grounds make excellent fertilizer for your garden soil. Easy to Clean: The inclined top of the knock box makes waste disposal effortless. The removable knock bar and smooth inner surface allow for easy cleaning with just a rinse or in the dishwasher. For added convenience, you can line the box with a garbage bag, eliminating the need for cleaning altogether. Sturdy and Durable: Made from high-quality ABS, the knock box features a durable, flexible rubber knock bar with a strong steel core. Precisely carved notches securely hold the bar in place, while the smooth edges protect your handle and hands from scratches. Noise Reduction and Anti-Slip: The rubber-coated bar absorbs sound, reducing noise during use. The rubber pad on the bottom prevents slipping on wet surfaces and won't leave marks on your countertop. Perfect Size for Limited Spaces: With a diameter of 4.5 inches, and a height of 4.3inches at the front and 4.1 inches at the back, this knock box prevents splashing and holds a generous amount of coffee grounds. Ideal for small counter spaces in homes and offices.