When transporting the Motion Synth Grip (in a bag for example), we recommend storing the Grip inside the box it was delivered in (the cardboard box that includes the AUUG logo).
In designing the Grip we tried to balance weight vs stiffness, and though the Grip is highly durable, some parts will bend under force. These parts can be bent back of course, but transporting with the delivery box can prevent bending in the first place.
Additionally, if you do not need your iOS device during transport, then transporting the Grip with your iOS device inserted within the Grip will make the Grip more resistant to bending.
If you require a crush-proof high-impact case, small camera cases with customisable internal padding are available for order online (e.g. ebay) can be found with search terms like 'small hardcase'.