Abstract: A mailer formed from one piece of relatively stiff cardboard and including a mailing flap, detachable when the mailer reaches the addressee. The mailing flap extends over an open-ended envelope carrying a slide card, connected to the envelope by a tab, to hold the slide card to the envelope during passage through the mail. The slide card may carry a message or may be used in cooperation with the envelope as an informational advertising or educational device. The mailer is formed from four connected sections. Three of the sections are defined by folds and a fourth section is partially severed from the cardboard and its inner end is defined by a slit extending for substantially the length thereof. This section may carry a message or cooperate with educational information on the envelope and is folded between the first and second sections defining the envelope and retained thereto by the tab.

Abstract: A slide chart made from an elongated card and particularly adapted to be self-assembled for use as a calorie counter for food products, such as soft drinks, cereal products and the like. The card may be inserted in a carton or other container for food products in its elongated form and may be assembled by the purchaser into a slide chart to give the calorie content of selected food products listed on opposite sides of the slide chart along opposite sides of slots on opposite sides of the chart. The elongated card has a locking tab at one end and a slide card separable from its opposite end.