The Shower Buddy may have been invented by Nick, Kurt, and Dale in Horrible Bosses 2, but was the Shower Buddy a made-up idea for the Horrible Bosses sequel, or does the product actually exist in real life? The first Horrible Bosses movie introduced three best friends, Nick (Jason Bateman), Kurt (Jason Sudeikis), and Dale (Charlie Day), who all despise their bosses, played by Kevin Spacey, Colin Farrell, and Jennifer Aniston, and vow to kill them. Horrible Bosses ends with Nick, Kurt, and Dale still working the same jobs with minor improvements to their circumstances.
https://screenrant.com/horrible-bosses-2-shower-buddy-real-fake/