As noted first by Bullets Forever and spelled out more clearly by Dan Steinberg, the Washington Wizards are mimicking the Capitals and handing out hard hats to whoever works the most at practice. John Wall took the hard hat for himself on Friday, Chris Singleton got it on Saturday and Andray Blatche got it, then handed it off to JaVale McGee on Sunday.
Here's an actual picture of the hard hat, via Adam McGinnis of Truth About It.
Phallic symbols galore, but hey, that's the logo.