That means you are posting in the wrong forum/thread. We are discussing dog breeds here.
If you want to look for airtight containers you should post in the forum: "Salted fish/Belacan for sale" that thread will point you in the direction where you can find your airtight container 20L.
You can also buy your container in old town wet market. Just look for laokao and tell him I sent you. He will give you a special price.