The Valero's we checked have moved to Styrofoam. Checked a Racetrac, with no luck. I will check the 7-11s in Plano, but I'm guessing if the one's in Richardson are already out of the white, they will be too.
I went on the hunt for the white double gulp cups, but I've not had any luck at 7-11s in Richardson, TX. If anyone knows where I can get the white ones, please send me a PM.
Thanks!