蓋子包裝（黑色）用於 SM-LB (-BZ) 霧面黑色

I noticed the threads on this cap packing are exactly the same as the original, so it screwed on smoothly without any cross-threading. The rubber gasket feels slightly denser than my old one, which should help prevent leaks over time.

The fit is perfect on my SM-LB mug — it snapped right into the lid groove and seals tight with no leaks so far. My coffee stays hot for hours again, just like when the mug was new.

Replacing the old seal was way easier than I expected — it slipped right into the lid groove and now my coffee stops leaking in my bag. The matte black finish matches the mug perfectly so you can't even tell it's a new part.