Polypropylene slide mailers offer a top-panel window which allows slides to be viewed without opening. Sturdy living hinge design with friction-fit, post-type locks. Easy-to-use finger/thumb tabs eliminate prying and/or cutting tape. Large matte-finished area is molded-in to provide ample room for identification. Slim shape makes it ideal as a component of transport and mailing kits. Integral lids close tightly. Recessed lid design limits slide movement during transit to prevent accidental breakage. Rounded corners allow easier handling, and an eyelet is provided for optional security ties and/or identification tags. Lightweight (less than 1/3 oz) to help minimize transport costs. Mailers also function as miniature Coplin jars for use in Pap smear testing.