Removable ice pack clips into the underside of the lid to keep food fresh and chilled. Measurement markings on the side ensure proper portions. Lid is tabbed on two sides to make opening effortless. Portion control made easy!These 2 cup, stackable containers include removable ice packs to keep food fresh and chilled. Set includes four containers, four lids and two removable ice packs. Container - Includes measurement markings on the sides to ensure proper portions. Lid - tabbed on two sides to make opening effortless. Removable Ice Pack - clips into the lid to keep food chilled and fresh.