Illustration by Mika and Minna Grondahl

If Mark Allen could find a way to pour beer with a consistently frothy head, the part-time barman figured he could work faster and get better tips. His prototype dispenser holds the glass at a 45-degree angle. As beer flows, the glass slowly moves to an upright position. The rate of incline depends on beer type-stout, lager, or bitter. The result: a perfect head, every time.

-Jenny Everett

4 Steps to the Perfect Cold One at Home

You don’t need a high-tech dispenser-Mark Allen offers these tips:

1. Make sure your glass is clean. Oil, dirt, or old beer can deplete the frothy head.

2. Hold your glass at a 45-degree angle and target the middle of the glass’s slope.

3. Slowly straighten the glass so that it’s at 90 degrees at the halfway-full point.

4. Continue pouring into the middle of the glass for the ideal 1 to 1.5 inches of head.