As the original 1 litre water bottle cap had worn and would not tighten down i designed this replacement, the thread on it is from fusion 360 and is 3/4 BSP and the actual printed thread diameter in metric is 26.3mm the original thread measured 25.7mm and in imperial printed is 1" 1/8 original was 1". Sliced using cura 4.4.1 using standard pla settings on ender 3.