Features: Working Principle : Ancient Principle, This exquisite glass bird barometer uses an ancient principle that changes in air pressure can predict changes in weather conditions.Practical, Different patterns are formulated according to temperature change. If the water in the glass is clear, which represents that the weather is sunny. If the water in the glass is cloudy, then the weather is cloudy. Weather Forecaster : With the glass bird barometer, according to the state formed inside the bottle, you can predict sunny, cloudy, fog, storms, snow, etc Attractive Appearance : The weather predictor is made of high borosilicate glass for excellent quality, bird design is cool and unique. Stunning Decoration Piece : While it cant ever be as accurate or reliable as a barometer or actual meteorological forecast, the patterns made are gorgeous and makes for a stunning decoration on any desk and dining table,Can be free to place, please enjoy the changes in a favorite place. Perfect Gift : This unique and unusual craft makes for a captivating gift for Valentines Day, Birthdays, Christmas, New Year, or any other occasion where you want to leave a lasting impression with its elegant gift box packaging   Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: Material: high borosilicate glass Production process: blowing Surface technology: polishing  Package List: 1x Glass Bottle