I measured the size and inside diameter, inside diameter 55 mm, outside diameter 60 mm For this product I tried with 54 mm inside diameter sake but it does not matter with the normal closing condition. I can appeal to owner as belonging to own and it is a good product.
It is normal for the lid to break first than the poly tank. It is appreciated that repair parts are put in hands, but there is a problem in the durability of the lid. I want the manufacturer to take measures.