The right size depends less on your training and more on what you pour in and where the shaker travels.

500 ml: Pace and Split

One scoop and water, or a pre-workout on the way out. Both fit a bike bottle cage, and Pace also slips into the front pocket of a running vest.

600 to 700 ml: Tempo and Rep

The everyday range. Room for a full protein shake with space left to mix, and still slim enough for a tote.

900 ml: Load

For two scoops, long sessions or a whole morning of water at your desk. The wide neck takes a heaped scoop without spilling.