Tested with an Apple Bumper case and a 500ml Arcoroc glass in my apartment: no effect.
Tested without the Bumper: still no effect.
Perhaps only certain kinds of glasses will work? Certain shapes or sizes?
Tested without the Bumper: still no effect.
Perhaps only certain kinds of glasses will work? Certain shapes or sizes?
There should also be a stainless steel band around the base which interferes with reception if you hold the glass the wrong way, ideally.