Without packing, it really does not leak out. The machining accuracy is also good, and the opening and closing operation of the lid is also very smooth. The part of the lid is made of PP so it has a slightly transparent feeling than the main body, it is also good to see the inside.
I tried looking for a wide mouth jar without an inside stopper so I bought it as a trial, and there is no water leak, it is a very good wide-mouth jar. I purchased each size because it seems to be able to put in various things. When I handed it to an acquaintance of a peer, the reputation was very good.