I am currently using the white mug postal boxes that Sublisupplies sell.
http://www.sublisupplies.com/mugs/wh.../prod_719.html
I think they are great but wondered if anyone on here knew of a cheaper supplier?
I have also used the ones that Listawood sell but prefer the Sublisupplies ones.
I only use the 11oz mugs from BMS by the way.