As to 500kg bag,
1.Can you provide 500kg bag in Thailand?
2.Shipment by continer in 500kg bag is very seldum.
I have only one experience before (Indonesia guano to Tomakomai )
I did not see how to load 500kg bag into container but presume
A)To use wooden palette, 2bags (upper and down side) are on
the palette and habdled as if one bag.
but this case, palette fumigation is necessary (cost up)
B) Without palette, bag is load one by one makes 2 stowage
cube by using short mast type fork lift.