Tesla CEO Elon Musk on Tuesday joked, "T-shirt is bulletproof & makes u buff," after Tesla began selling T-shirts showing Cybertruck's cracked window from the vehicle's unveiling ceremony for $45 (around ₹3,200). During Cybertruck's unveiling in November, Musk invited Tesla lead designer on stage to test Cybertruck's durability. Cybertruck's windows shattered on being hit by a steel ball bearing.