1. Bottle body material: High borosilicate glass is selected, which has a very low coefficient of thermal expansion and enjoys good thermal stability.
2. Smooth bottle bottom: The bottom of the bottle is round and wide, allowing for stable placement. It is exquisitely beautiful without any protrusions.
3. Strong sealing property: The frosted bottle mouth, in coordination with the bottle stopper, has a strong sealing capacity, preventing liquid spillage and being less susceptible to wear.

Working Environment Conditions: 
1. Temperature Requirement: The ambient temperature should be controlled within (20 ± 5)℃. During the experiment, the temperatures of the Specific Gravity Bottle and the liquid inside should be maintained as uniform as possible to avoid volume variations due to temperature discrepancies, thereby influencing measurement accuracy.
2. Environmental Requirement: The laboratory should be kept clean and dust-free, with direct intense light and mechanical vibrations avoided. The surrounding environment should be free of obvious factors that interfere with normal operation.
3. Cleaning and Drying: The Specific Gravity Bottle needs to be thoroughly cleaned and dried before use to ensure the absence of residual moisture or impurities, which could otherwise affect the measurement results.
4. Calibration Condition: The pure water (distilled water or deionized water) used for calibration should be placed in the laboratory 24 hours in advance, ensuring that the temperature difference from the room temperature does not exceed 2℃.
Precautions:
1. Clean and Dry Thoroughly: Before usage, clean and dry it thoroughly to prevent residual impurities.
2. Consistent Temperature: Maintain consistency in the temperatures of the Specific Gravity Bottle and the liquid to avoid the influence of temperature differences.
3. Handle with Care: The pycnometer is fragile, so handle it delicately during operation.
4. No Air Bubbles: Ensure no air bubbles when filling the liquid to avoid affecting volume measurement.
5. Excellent Sealing: Ensure a tight seal between the stopper and the bottle mouth to prevent liquid leakage.
6. Accurate Weighing: Utilize a calibrated balance and take the average of multiple weighings.
7. Avoid Contamination: During operation, avoid hand contact with the liquid or the inner wall of the bottle to prevent cross-contamination.
8. Regular Calibration: Periodically inspect the wear of the Specific Gravity Bottle and calibrate it.
9.Safe Storage: After use, clean it thoroughly and store it appropriately.