This is the heat activated lightsaber mug [AMAZON AFFILIATE LINK] you may have seen on Amazon. A black backdrop wraps around the white ceramic mug.
NSR is a commonly used term in lightsaber forums, in the r/lightsabers subreddit, and in lightsaber Facebook groups like The Vault: A Custom Lightsaber Community.
Darth Cephalus, a lightsaber enthusiast who runs a lightsaber-themed YouTube channel, released images of his custom Jedi and Sith holocron run. Holocrons, sometimes called datacrons, are