Vacuum barrel and barrel body thereof

A barrel body of a vacuum barrel, comprising:

• a melamine barrel wall;
• a melamine shell flange;
• and
• a melamine bottom board;
• wherein the melamine barrel wall is disposed in a closed ring shape, the melamine barrel wall defines a top opening and a bottom opening, and a shape of an outer contour of the melamine shell flange is matched with a shape of the top opening;
• wherein the melamine shell flange is disposed at the top opening, and an edge of the melamine shell flange is sealed with the top opening, and the melamine shell flange is configured for sealing and mounting with a barrel cover;
• wherein a shape of the outer contour of the melamine bottom board is matched with a shape of the bottom opening, the melamine bottom board is disposed at the bottom opening, and an edge of the melamine bottom board is sealed with the bottom opening;
• wherein a food storage cavity is enclosed by the melamine shell flange, melamine barrel wall, and the melamine bottom board, and an opening is defined in the melamine shell flange to serve as an inlet of the food storage cavity.