Water Bottle Stopper

NOTE - SEE "CAUTION" SECTION, BELOWThis is a replacement stopper for a "Cheeki" brand stainless steel water bottle/canteen. The threaded section has inner diameter 29mm, with the outside of the thread approx 33mm diameter and the flange 35mm diameter. Thread pitch is 4mm. You could scale it for other pressed steel bottles. Note that the thread in the Cheeki bottle is pressed in the steel, and hence rather vague and coarse. Sigg, Optimus, Brunton, Primus, MSR, Snow Peak, and Kovea bottles all use the Sigg thread, which is a proper cut thread and requires a stopper with a proper thread profile, not the shallow flat form used on this stopper. The bottle is sound but the original stopper broke, and it became apparent that the design was poor - the inside was hollow right up into the handle, with resulting inner areas in contact with the drinking water but pretty much impossible to clean properly. This replacement has a flat end, with no inner bits to clean. (Theoretically anyway - if the print isn't good or the material porous, it could be significantly more of a germ trap than the original, be cautious.)