If milk jugs are acceptable, that’s probably a better option anyway. I don’t think there’s any standard for detergent bottles, so you’d have to make a different version for each type of bottle. At least in my country, milk jugs caps are fairly universal.
Actually, yeah. Those look more like milk cartons though which is another acceptable thickness/hardness.
If milk jugs are acceptable, that’s probably a better option anyway. I don’t think there’s any standard for detergent bottles, so you’d have to make a different version for each type of bottle. At least in my country, milk jugs caps are fairly universal.