Commonly used for small containers, and the spout cap has push-on design.
Used for containers with relatively large volumes, metal ring needs to be crimped to ensure sealing function.
Spout cap for oil tin is usually designed to have push-on function. Size of the spout cap needs to be the same as the container opening to ensure the best sealing function. Crimping tool is necessary to install the flexspout cap with metal ring. Proper crimping will fix the spout cap firmly, and prevent leaking of contents inside.
When opening a container with flexspout cap, the first step is to pull the ring on cap and pull out the mouth. Then rotating and removing the cap on the flexible spout top. After desired liquid is poured out, put back the cap and then push the flexible spout back.