The Large Hadron Collider collides protons. A good source of protons is Hydrogen, just strip the electrons off and away you go.
This little red bottle is their Hydrogen source. Not for a week or a year...that one bottle is enough for 200,000 years.

(Img: https://commons.wikimedia.org/wiki/User:Saintfevrier)

User:Saintfevrier - Wikimedia Commons

@_thegeoff
I love that white label "a proton source". Feels like the kind of label I put when I label something just for the sake of doing so
@lonion Only a step away from using your labelmaker to print a label for your labelmaker reading "labelmaker" 🤣