Recommended
EEVblog #247 - Anti Static Bag Myth Revisted
Why people recommend it
Dave Jones tests anti-static bags, showing pink bags avoid generating charge but do not shield contents from external discharge; cited on ESD storage questions.
Watch for: pink versus metallised bags
In their words
Dave Jones at EEVblog did a nice series of tests (YouTube) on various types of bags; well worth a watch.
Alex Hajnal on electronics.stackexchange.com, Apr 2020. CC BY-SA.
Anti-static foam will not generate static charge when it rubs against itself, but will happily pass a charge through itself to anything contained within (thanks to EEVblog for explaining that one).
user39075 on electronics.stackexchange.com, Mar 2014. CC BY-SA.
I recommend watching the two videos from EEVblog: #247 and #250.
Arsenal on electronics.stackexchange.com, Nov 2015. CC BY-SA.