Tesla fans can buy branded t-shirts, jackets, hats and hoodie sweatshirts.
Soon, they will also be able to buy Tesla "short shorts," according to a tweet from Tesla CEO Elon Musk, in his seemingly never-ending war of words against investors betting against the company.
Tesla declined to comment further.
Einhorn holds a short position of Tesla shares through his hedge fund, an investment decision that indicates the hedge fund executive thinks the price of Tesla will fall. Further, Einhorn recently made public his decision to not renew his Tesla lease.
In response, the outspoken Tesla CEO tweeted he would send Einhorn a box of "short shorts," which Einhorn revealed on Friday that he had received.
I want to thank @elonmusk for the shorts. He is a man of his word! They did come with some manufacturing defects. #tesla
Alas, there was a plot twist: San Francisco-based online clothier Chubbies actually sent the shorts to Einhorn, independent of Musk. Still, the billionaire entrepreneur seemed pleased that the apparel maker had followed up on his joke.
Musk followed up his promise of selling "short shorts" with a number of tweets asking followers for their favorite brand of shorts, and suggesting the shorts should be paired with high socks.
As with much of Musk's Twitter feed lately, it's not entirely clear whether the Tesla CEO was serious or joking.
This story has been updated.