if its empty
Yes, you can carry it on. But if the flight is operated by a US commercialcarrier, then you can't turn it on between doors-closed and landing.
Yes, you can, but you must pour out its contents before going through checkpoint. Once you are through checkpoint, you can buy beverages for your mug and carry it onto the plane.
You can carry as many cellphones as you like with you onto a commercial passenger flight, just as long as you make sure that all of them are OFF when the crew advises you to do so.
I don't know if there is any rule against bringing chewing tobacco onto airpanes, but I've never had mine taken away from me at security.
"sombrero" or "gorra" Sombrero. sombrero Sombrero
Yes, you can carry a pedometeron an airplane. (TSA haven't yet realised it's potential as a weapon)
Yes, you can.
A gun
guns
Yes, you can.
Carefully.