Dan, the CUB-bubbles (Uncle CUB Cubblebee Bubblebee) are not in the US yet, they will be, as Whit said, in a few weeks.
The CUB-bubble is very well closed all the way around, also where the cable is, I promise you.
The tests for the CUB-bubbles (page 7-8-9 in the memo) you can see under LAB - http://www.bubblebeeindustries.com