Why glass keeps your masala alive longer

The aroma of a spice is volatile oil, and volatile oil leaves. Light accelerates it, oxygen oxidises it, and humidity clumps the powder so it stales unevenly.

Laminated pouches are cheap and permeable — once opened they offer almost no barrier. Glass with a metal seal keeps moisture and oxygen out, does not absorb aroma between refills, and can be washed and reused indefinitely.

That is the entire reason AshaPure ships in reusable jars and never in pouches. Keep the jar closed, use a dry spoon, and your haldi will smell the same in month six as it did on day one.