FlipVR is a new style VR controller. Its main feature is the ability to flip the control panel (control buttons, thumbstick, grip, and trigger) from the palm side to the back of the hand with a twist of the wrist.
In the flipped state, it’s possible to grab a drink, use a keyboard or mouse, or play an instrument in the real world without losing hand position tracking. Simply flipping it back returns it to its original state (Same as standard controller).
Just slide the onahole through the palm strap.