Tesla's $50 USD Cyberwhistle Has Already Sold Out

The $50 USD Cyberwhistle inspired by Tesla's upcoming Cybertruck is out of stock just a day after it was announced.On Tuesday, Elon Musk tweeted the whistle, which was available for purchase on Tesla's online store."Inspired by Cybertruck, the limited-edition Cyberwhistle is a premium collectible made from medical-grade stainless steel with a polished finish," its description read. "The whistle includes an integrated attachment feature for added versatility."In his announcement, Musk joked about...