Practical for home use or as teaching material for universities, schools and kindergartens. Many people know it from before - the hyacinth glass (mostly made of plastic) The glass was our source of ideas. In our experience, however, it is absolutely necessary to make the glass separable so that rewatering or changing water is easy to handle. The growing glass is available in 2 different sizes, with either a high or a low top. With the large growing jar, we also have a glass attachment with 3 openings as an accessory in which small onions can be placed. This means that you can grow 3 flower bulbs at the same time, for example. To help them achieve success quickly, we recommend revitalised water from our water carafes and jugs as well as organically grown onions and tubers for good and healthy growth. The package includes the glasses only.