This is a lid adapter for the utopia cereal boxes on amazon that houses a bowden tube connector. The connectors that were used were these: https://a.co/d/5SXa7fk and the cereal box that it fits is the 4 liter 4 pack of these: Amazon.com: Utopia Kitchen Cereal Containers Storage - Liter Airtight Food Storage Containers & Cereal Dispenser For Pantry Organization And Storage (Clear, 4 Liter Pack of 4) : Home & Kitchen
This works great with a dry box roller setup. The thread fit is tight. If you have issues let me know and I can add some tolerance if needed.
The author marked this model as their own original creation.