1. Electric heating and constant temperature insulation: Put the rice dumplings into the steamer, and use a constant temperature electric heating and insulation furnace with 90-degree hot water at the bottom.

2. Foam box insulation: After preparing a clean foam box, first put a layer of thin quilt on the inner wall of the foam box, so that the insulation effect will be better, and then put a layer of thin quilt on the outside. White cage cloth.

3. Customized insulated boxes and insulated display cabinets: Customized insulated boxes are relatively more cost-effective, but the effect is better. It is convenient, saves time and effort, and does not require too much labor. But you need to have a fixed stall and store.