I have wondered about the red ones. Never seen an orange one. There is a white one and a brown one. I can't remember which one is which, but I believe the max mark on one is about 7.5 quarts and the other is about 8 quarts. There is a TSB on the white vs brown. I looked it up and posted something about it a year or so ago. It could be found by doing a little searching. As I recall, the TSB is a bit vague and really didn't give a reason for the change.
2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg
And remember folks, Only You Can Prevent Hilliary.