That's what the hole is there for - a RAM mount. You could configure a 2 item holder from what they have to offer.
They are RF not optical (battery not RF excited by the reader at the toll booth) around here. The antenna is somewhat sensitive to orientation to the toll booth and don't work well near your body. Blrfl posted some details about the x'ponder specifics on another post a while ago. The ABS plastic in the tupperware should not be an issue for RF.
That is what I figured. It is possible that different makes or areas would have different specs. What they use here in Minnesota is there is one highway on the other side of the Twin Cities from me and they have a commuter lane. If you are in that lane it charges you whatever the going rate is. However cars that are carpooling and I think motorcycles can use it without charge. I can see where it needs to be sensitive because there would be instances where someone that may have a pass may choose to not drive in that lane because they are not in a hurry. The lane at places is only marked with a solid double white line. They do not have toll booths on this part of the road and the only way to pay the toll is through some epass or EZpass system. So in the case where you are not using the lane but driving next to it the system needs to be accurate enough to know the difference.
