What tools are recommended for holding odd-shaped items while laser engraving?

My favorite product for holding many odd-shaped items, keeping things in place, and preventing movement is modeling clay. It is extremely adaptable and lasts for decades. I can mold the clay around corners of products to hold them in place or mold it to any height and angle to keep an item flat. It sticks well to my laser table, yet releases quickly. It’s adaptable and perfect for those client’s products whose shapes cannot be anticipated.

-Bob Hagel, Eagle’s Mark