The rubber seal is a better audio seal though, which is more important.

CamperBob2 · on June 26, 2013

Probably best to put the phones in the microwave, and leave the microwave in the bathroom with the shower running to create masking noise.

Or just turn on the microwave for a few seconds. :)

snogglethorpe · on June 26, 2013

Wrap the phones in tinfoil, put the wrapped phones inside the stainless-steel martini shaker (see other thread), put the martini shaker inside a microwave, put the microwave inside a refrigerator, and put the refrigerator in the bathtub.

Now turn everything on "high", including the shower ("hot & steamy"), and run.

Snowden's guests will have done that a while ago of course...