Its just the right size when you want to divide your honey lemon water or homemade shiso juice. Makes a drink size souvenir. Recommended for creating a petite gift filled with beautiful bath salt. Glass used for general food bottles etc. (Not heat-resistant glass) If sudden temperature difference (sudden or sudden cooling) occurs above 104°F (40°C). Soda glass is no problem even if the temperature difference is above 100 degrees Celsius (sudden or suddenly cooling) is not affected even if the temperature is above 100 degrees Celsius. Please note that the contents (jam, etc.) and the temperature difference between the bottle may cause damage. Please note that it is not microwave or oven safe. PECAP will deform when placed in boiling water or boiling water. Please do not disinfect boiling.