The amber glass body naturally blocks ultraviolet light, safely storing photoresists and photosensitive electronic chemicals against light-induced degradation. The cap contains a PTFE corrosion-resistant gasket with tight thread engagement, effectively suppressing chemical evaporation and leakage. A fully dust-free ultra-clean washing process strictly controls particle and metal ion leaching and will not disturb precision chemical testing. Compact and lightweight with no unnecessary protrusions, it stacks without wasting space — suited to routine laboratory sampling and retention, and small-dose high-purity reagent dispensing for testing on production lines.