I need a microwave tester bar

I have lost the second one now and I need a new one, OF THE LITTLE CLEAR BARS THAT INSPECTORS PUT IN THE MICROWAVE IN LIEU OF A CUP OF WATER. THEY FLASH WHEN THE MICRO GUNS FIRE MICROWAVES.

CAN’T REMEMBER WHERE I GOT IT. CAN ANYBODY HELP ON THIS?

Thanks Dan!

The flashers fell out in mine.

I left my last one in the home… again :roll:

After losing one and having one break, I just use mugs from the dollar store…