密封蓋，黑色 isoBottle

The cap clicks on firmly with a satisfying seal, and the black finish matches the bottle well. It fits exactly like the original, so no more spills in my bag.

Wasn't sure a spare cap would fit as snugly as the original, but it screws on tight and doesn't leak when I toss the bottle in my bag. Same black finish too, so you can't even tell it's a replacement.

Lost the cap to my bottle and figured I'd have to buy a whole new one, but this replacement screwed right on like the original. Good tight seal, no leaks in my bag so far.