physics paraphernalia

unrelated but thank you so much for introducing me to such a cool site oh my gosh (cognitive surplus)

I also didn't know of the website you shared so thank you so much for sharing! The stuff on there looks awesome. The only place I know of where one could get stuff like that for particle physics would be, admittedly occasionally, the PBS SpaceTime merch store. On their YouTube channel they sometimes discuss that sort of thing and so sometimes they'll have related merch, for instance right now they have a UV charged shirt depicting the particle collision that the higgs was detected in for the first time. and they have a mug with the full standard model lagrangian on it! The shirt is limited edition though, as the UV charged stuff usually is in my experience, so I'd definitely recommend getting it soon if you want one. I hope this'll be helpful to you, the website you shared definitely will be to me :-)