Disclosed is a product cushioning device for supporting a shock sensitive product during shipping, said product cushioning structure being made of a moldable resilient plastics material. The device comprises a plurality of device surfaces suitably shaped and sized to accommodate the shock sensitive product, one of the plurality of device surfaces including a product supporting region at least partially surrounded by product contacting walls, and having a product supporting platform in the lower region thereof; and a three-dimensional structural feature formed into a least one of the plurality of device surfaces; wherein the three-dimensional structural feature serves to control the amount and rate of deflection in the event of impact. In one embodiment, the three-dimensional structural feature comprises a plurality of lines of weakness in a projecting part protruding from at least one device surface being formed of a male mold, wherein in use a top portion of the projecting part rests against the product. In another embodiment, the three-dimensional structural feature comprises at least one donut shaped cavity in the product receiving cavity. Also disclosed is a method of making a product cushioning device in accordance with the teachings of this invention.