Size:49mm ï¾ |ï¾ Color:Red Tamping is the process of compacting ground coffee beans in a filter cup before use. Tamping evenly distributes the coffee beans and firmly packs them into the cup. This is needed to slow water flow through the filter cup, let water spend more time in contact with the beans and pass through the beans evenly. Tamping extracts more flavor into your cup. For serious coffee drinkers, Zoie + Chloe’s coffee tamper is a must have.