Vesture Hot Pack-Replacement Microcore Pac for Casserole Carriers (Red Pack For Microwave Heating). Vesture Hot Packs utilizes microcore technology to safely keep your meals and food fresh and hot. The famous red packs for those old school casserole carriers are still available for purchase. So many people still use their casserole carriers for bringing their delicious meals to Thanksgiving, soccer games, and pot luck dinners! The red microcore pac is easily heated in your microwave or cooled in your refrigerator or freezer. It is far safer than gel – filled with a non-toxic liquid. The elegant design distributes the heat or cold evenly. But they didn’t trade style for strength – the durable FDA-approved flexible outer film can withstand over one ton of pressure! Place in any type of container for continued heating or cooling. The American family still depends on casserole carriers to contain and warm their meals. The fondest memories we hold are those of coming together over meals – the breaking of bread, sharing of wine, the communal process of preparing food for one another. Make sure your meal arrives right. Buy a Vesture red pac to ensure that when you get to your party and unwrap your meal, it will be perfectly ready to serve.