RE:I found it interestingHi patience123,
Sorry to burst your bubble but chek the following tweet from Elon Musk about the backdrop of the battery day invitation, which is the same image as their t-shirts.
Many thought it had to do with Amprius and nanowires but Elon shut down that theory:
"
https://twitter.com/elonmusk/status/1298880004332412929
patience123 wrote: That even though during Elons and his partners presentation there was not one mention of nano silicon or silicon wires...yet both of them were clearly wearing t shirts with pictures of silicon nano wires. This was not accidental. It was deilberate and planed.