We use 316L SS for our mixers and storage of this product. I'm not sure if the choice is for color or corrosion.
We receive a lot of esters in CS containers whether this is one I don't know how it is shipped.
You might contact your supplier of the material for recommendations.
All the methyl esters we make the material of construction is all 316L SS for both process and storage the catalyst and H2SO4.