1. Good sealing. The barrier properties of packaging containers such as custom square tin boxes to air and other volatile gases are very important for the preservation of nutritional content and sensory quality. The comparison of various juice packaging containers proves that the oxygen transmission rate of the custom square tin box container directly affects the browning of the juice and the preservation of vitamin C; the metal cans, glass bottles, and aluminum foil glued layers and carton boxes with low oxygen transmission rate are not suitable for Vitamin C is better preserved, and iron cans are the best.

2. Reduction of tin. The custom square tin box is also called a tinplate. The tin on its inner wall will interact with the oxygen remaining in the container during filling, reducing the chance of the food ingredients being oxidized.
The tin in the custom square tin box has a reducing effect and has a good preservation effect on the flavor and color of light-colored fruits and juices. Therefore, the juice cans packed with unpainted tin cans are more nutritious than those packed with other packaging materials. Good, slight browning, better acceptance of flavor quality, and thus longer shelf life.
Through the above introduction and analysis of the Characteristics of custom square tin box, hope it helps you.