Lakeland easi yo yoghurt maker. I got a lot of these when they were free with the yoghurt and had quite a few over.
Either not used or hardly at all used, you can make your own yoghurt in the flask with long-life milk and a starter that is a few tablespoons of yoghurt. To go as soon as possible.
photo later, no jar, but you can get one at Lakeland or use your own container, such as a 2lb jam jar photo in a bit.