Foldable templates include sheet material with a front surface and a retaining element connected to the sheet material extending over at least a portion of the front surface. In box insert configurations, the sheet material has transverse and longitudinal creases, the retaining element extending across the creases. In retaining box configurations, the sheet material includes a base panel and opposing longitudinal side walls, with transverse creases extending across the base panel and side walls. In each template, folding the sheet material upward along transverse creases opens a receiving area between the front surface and retaining element to receive a product. In the box insert configuration, folding the sheet material downward underneath the front surface along transverse creases pulls the retaining element tight over the product. In the retaining box configuration, folding the side walls upward flattens the transverse creases and pulls the retaining element tight over the product.