Designed with the SD1 in mind and not to replace it—maintaining the same semi-immersion method but with faster flowrate to provide users with more flexibility in brewing, like more range of grind sizes, water temperatures, and pouring techniques. Same design features but with smaller form and leaner angle (48 degrees). Users could also keep a peace of mind when choosing filter paper as the Ruler is also provided to help folding standard 01 size filter into a precise shape. Continuing with the thoughtful design principals, the Ruler also functions as holder if needed—considering a very small form factor of the SD1R.