Keolia Stainless Steel Yogurt Maker with 1-Quart Glass Jar

A Complete, Plastic-Free Yogurt Kit in Glass and Steel

The Keolia takes the simplest, cleanest way to make yogurt, a glass jar kept warm by an insulated steel flask, and builds it out into a full starter kit.

At its heart is the same plastic-free, no-electricity design we look for: a one-quart glass jar that holds your milk and culture, an insulated stainless steel thermos that keeps it at fermentation temperature with no element or cord, and a glass-and-steel food path with nothing plastic touching what you eat. Around that, Keolia adds the pieces a beginner actually wants on the counter, a thermometer to nail the temperatures, a bamboo spoon, and a professional recipe cookbook for dairy and plant-based yogurts alike.

That makes it a particularly good entry point if you have never cultured yogurt before.

You are not hunting for a separate thermometer or guessing at temperatures, and the cookbook walks you through coconut, almond, Greek, and more. As with any good yogurt maker, you stay in full control of the milk and starter, so there is no added sugar or stabilizer unless you put it there, and the whole set is compact and handsome enough to leave out.

True Shift Score: 8.7 / 10

This is our own assessment, not a lab result or a certification.

It scores high because the whole food path is inert, glass jar, stainless flask, bamboo spoon, with no plastic and no electricity, and the included thermometer and cookbook make it an unusually approachable way in. It sits just shy of the top for the same honest reasons any non-electric maker does: it is a hands-on process rather than push-button, and the glass jar can break. For a complete, plastic-free yogurt-making kit, it is an excellent choice.

The Honest Tradeoffs

The honest notes here are the same ones that come with any non-electric maker, softened a little by the included thermometer.

1. This is still a hands-on process: you heat the milk to about 190°F, cool it to roughly 110°F, add the culture, then let it ferment and chill on its own schedule. 

2. The thermometer takes most of the guesswork out, which is a real advantage of this kit, but it is not a walk-away, push-button machine, and that is the point of it. 

3. The glass jar is inert and easy to clean, and like all glass it can break, so a backup jar is worth having. 

4. And because the heat comes from insulation rather than an element, a cold kitchen can stretch out the fermentation time. 

5. None of this is a drawback so much as the honest nature of plastic-free, no-power yogurt.

How We Evaluate Appliances

1. We look at the part that matters most, the surfaces your food and drink actually touch, and ask whether they are inert materials like glass, stainless steel, and wood, or whether they are plastic and nonstick coatings. 

2. We favor manual and non-electric tools wherever they can do the job, since they tend to keep plastic out of the food path entirely, and where an appliance does involve plastic or a coating, we say so plainly. 

3. Few appliances are ever perfectly plastic-free, so the goal is keeping the most plastic out of what you eat.