Magical physical changes: Storm glass is a kind of sealed glass, a transparent liquid made of distilled water, which can be transformed into physical states, and storm glass crystals will take on different shapes according to temperature and weather changes. Weather Forecast Barometer: The liquid in the glass bottle ranges from transparent to cloudy to crystal clear, presenting states such as feathers, trees, snowflakes, etc. according to the ambient temperature, forming amazing patterns. The cat storm bottle is a stylish decoration for home, office, it is a wonderful craft weather gift, where can you put it? (balcony, living room, bedroom, study, kitchen or office) Colour:As Shown Material:Glass type: A Package Contents: 1 x Storm Weather Predictor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.