What does the e stand for at the end of ml on a bottle of shampoo or shower gel etc.?

eg is 130 ml e / 4.40 Fl Oz


Whats the e mean???What does the e stand for at the end of ml on a bottle of shampoo or shower gel etc.?
equivalent it means the weight equivalent of 130 ml of water.What does the e stand for at the end of ml on a bottle of shampoo or shower gel etc.?
I'd hazard a guess that it's something like ';European,'; but I can't say for sure. Seems a bit redundant to me, if that's what it is, but they didn't ask me ;-)