Looking to host a secret holiday party away from the prying eyes of the State? Or would you prefer, whatever the season, to carry your cell phone with you but not have your every move tracked? You're looking for what's called a Faraday bag--a pouch that is lined with material intended to block all incoming and outgoing cellular network, WiFi, Bluetooth, and other signals. Be careful though, because not everything sold as a Faraday bag is equally reliable. CLDC has looked at what's out there, done our own preliminary tests, and this one seems like the best option. It's marketed to police forensics to prevent a cell phone that's meant to be used as evidence from being remote-wiped. Buy one from us and support our work! Bonus: you won't have to engage with a sketchy, cop-friendly company! Remember: If you really want to have a secret party, ask your guests to put their phones in their Faraday bags before leaving home! And No Faraday bag (as far as we know) is soundproof in any way. So, if you're looking to be certain that any secret party chatter is not overheard by a compromised phone (as unlikely as this is!), make sure to put your phone in another room with loud music on. PS: Please see this link to read our blog post re: private meetings!