It is designed for the preservation of small-volume pathology specimens, made from high-quality medical-grade composite rigid plastic, providing excellent transparency for easy specimen observation. It is scratch-resistant, abrasion-resistant, and crush-resistant. It is a domestic innovation with a patented design and includes a rotary blade structure that allows easy placement and retrieval of specimens with a simple knob operation. It can be used as a replacement for existing products such as pathology preservation bags.