UPENDS Uppen’s cap Hidden efficacy？

[UPENDS_Sampson]

The dust-proof effect of the Uppen lid is obvious, but it has another hidden effect, can you guess?
Hint: It's related to e-liquid

Leave your answers in the comments below.

 

[MLEJ]

The dust-proof effect of the Uppen lid is obvious, but it has another hidden effect, can you guess?
Hint: It's related to e-liquid

The lid has a special coating that repels regular dust and infuses e-liquid with magical pixie-dust, enhancing the flavor and enabling the user to fly when they think of the happiest things.

Also, it blocks air & light so the e-liquid won't become oxidized.

 

[AvaOrchid]

Maybe it keeps the vacuum effect so you don't experience leaking if you go on a airplane or go to a higher altitude