Well, I was also rather mystified by the Vic's Secret Water Bra when I ended up doing laundry once.
Reached into te pile of clothes and pulled out this jiggly squishy piece of fabric.
Sat there and made it 'flubber' about for a few seconds before asking what it was and why it was in with my shirts.
The answer was, "Because you were doing laundry and I needed it washed for tomorrow."
I'm not touching that.
I think bras get washed in this house about 3 times a year.............because that's about as often as I wear one.