غطاء زجاجة قابل للربط

The threading is precise and tightens smoothly—no annoying cross-threading like with other lids I've tried. It seals completely, so I can toss it in my bag without any leaks.

Fits my canteen perfectly, though I wish it came in a third size for my old travel mug. The threading is solid and seals tight with no leaks so far.