A bilateral frontal sinus insert which has a flexible body defining an interstitial member adjacent a horizontal tube and a vertical tube. The flexible body having entry and exits apertures for fluids and or particulates in fluid form. The fluids or particulates can include medicines. The body flexes for insertion within the sinus area, positioning within the sinus area and for extraction from the sinus area. The interstitial member is defined by an aperture or by a layer of flexible material in between the vertical and horizontal tubes. Downward or upward movement of the vertical tube is used to reduce or increase the width between the interstitial members for retaining or releasing fluid in a controlled manner.
