Container Bags for 20 and 40 inch containers and you can use for the trucks. This type liner bags using for transporting of cereal, pulse all kind bulk product

Container Bag, Liner Bags

Container Bags - LinerBag

Container liners use for 20 and 40 inch containers.
The loading will be an efficient transport system for bulk goods.
The liner made of polypropylene fabric and the fabric is attached
to the inside of the container, the product does not touch the container itself.
Container Liners using for the following products:
agricultural products,
seeds and food products.

Container Bag provides an extra wall between the container
and bulk products and prevents any contamination.

Source Wikipedia
container Bulk Sacks
40 inch Contanier Bag
liner Beg