Metallica drummer Lars Ulrich shared a recent photo on his Instagram account and wanted to play ‘Guess what’s in the cup?’ with his followers.

Here is what he wrote:

“Now that we know each other so well, it’s time to play ….”Guess what’s in the cup??”😜😳🤪 #wanna

A fan named spookypassmore commented:

“Half of an album cover 😂

buchananallan wrote that:

Dave Mustaine’s tears.”

Another comment from masterofpuns:

“It’s the piss used on the reload album cover. PS pls give us Fixxxer.”

You can see the photo below: