Why are there numbers (1-5) on the chamber of AeroPress Steel if you can’t see the coffee inside?Updated 2 hours ago

The 1–5 markings are a recognizable part of AeroPress design, so we intentionally carried them over to AeroPress Steel. To help with fill guidance, the inside of the chamber includes a laser-etched mark at the 5 level that can be seen from above. Most people can simply fill the amount of water they want. If you want more consistency, you can measure water with a measuring cup. For the most precise brewing, you can also measure water with a scale. Do not press while the AeroPress is on a scale.