PCAP Or It Didn't Happen sticker

Product Page

If you know what a packet capture is then I don't have to tell you how important they can be, but not everyone does know, so go forth and spread the word.

For when proof is needed

from here (image source)

The hats are merchandise you can buy and wear, and although they're not technically security related I can't help but wonder how many digital forensics investigators are out there wearing hats like this already because their taste in terrible visual puns is as bad as mine.