How do you ship a transmission?

Friend that owns a shop has shipped them in big Rubbermaid tubs. He Packed Styrofoam around it to keep it from moving in the tub....
yup ive done this go to walmart they have a super heavy duty tote that has locks you just have to keep the total weight under 150 and fed ex or ups will ship it the last tranny i shipped was 146 lbs