What feature do snap lid bottles have to secure the cap?

Snap lid bottles are designed with a snap-on type seal that creates a secure closure. This feature is essential for ensuring that the contents of the bottle remain contained and protected from external contaminants during sampling and transport. The snap-on mechanism allows for a quick and user-friendly closing method, which can be particularly important in field sampling situations where efficiency is key.

Unlike other closure types, a snap-on seal does not require additional tools or significant force to secure the cap, making it an ideal choice for maintaining the integrity of samples collected in water quality assessments. The design prevents accidental openings and ensures that once the cap is applied, it remains in place until intentionally removed.

This characteristic is essential for water sampling as it meets the requirements for preserving the quality of the samples by limiting exposure to the environment or potential leaks.