Caffeine, without the costume

ONSO started with a small irritation: every caffeine product on the shelf wanted to be noticed. Neon cans, sour flavors, names in all caps. None of it had anything to do with why people drink caffeine in the first place.

One formula, nothing added

100mg of caffeine and 200mg of L-theanine per stick. No sweetener, no flavor, no color, no fillers. It dissolves clear, so your coffee still tastes like coffee and your water stays water.

A container you keep

The jar is designed to live on a desk rather than hide in a drawer. Refills arrive flat, in a pouch sized for a letterbox, on the cadence you choose.

The first run is limited

We make in small batches while the formula settles. The list orders first, and everyone on it hears the same day.