Features: 1. Natural and beautiful decorative bottle: The creative glass weather forecast is a gorgeous handicraft that can be used to decorate the balcony, 2. Magic Storm Glass: From sunny to cloudy, from crystal to snowflakes, you can predict that the liquid will be sunny, cloudy or thunderstorm. 3. Unique gift: birthday, wedding, Valentine's Day, Mother's Day, Father's Day, Thanksgiving, Christmas gift. Specification: Name: Weather Forecast Bottle/Storm Bottle Material: borosilicate glass, liquid and wooden base Size: about 6*18 cm/2.4*7 inches Single set weight: approx. 175 g Packing size: about 7.8*7.8*27.8 cm/3.07* 3.07*10.94 inches Applicable occasions: Home office Function: Weather forecast, home decoration (can predict from sunny to cloudy, from crystal to snow, the liquid will be sunny, cloudy or thunderstorm. Note: Temperature change is the most important factor in crystal growth. ) Original The invention was devised by a British naval lieutenant (Robert Fitzroy) and used on European ships in the 19th century. As a meteorological observation device, biologist Darwin used this device to assist navigation at sea. In other words, changes in air pressure can predict changes in weather conditions. It became modern art and weather forecaster. packing list: Weather forecast bottle*1 (including base) Note: It may take one to two weeks for the storm glass crystals to stabilize and acclimate. If you want to see the test results, you can put it in the refrigerator for half an hour to an hour to see the effect of the change.