203
ICE buys tool to monitor millions of smartphones. Experts say it’s dangerous
(www.independent.co.uk)
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
Probably the best way to make a tight seal is to make it twice as long as needed, then just fold the opening over three or four times.
I've found that to be pretty effective.
I made one with hair elastics wrapped up in the duct tape to keep the seal shut.
None of the shit I ordered off Amazon worked worth a damn so I made my own.