Thank you for looking into my idea. However what you just looked into was in the Research Phase. You can take look at my contribution that was in the Ideas Phase, where there are more details, or better yet, please watch my video at: https://www.youtube.com/watch?v=_dlOij6XM0s
I hope this inspires you to improve on this and possibly expand into the foods/drinks category!
I like where you're going with the "Old World" feel with the integration of new technology. It is for a fact that consumers are looking for a specific amount of a product that they want to use but couldn't because the current packaging system gives them fewer options.
I actually have a similar idea, but to make the weighing process easier, I implemented an electronic card system. I thought up of a filling station that puts the price data inside the card after filling so there won't be long lines at the checkout. In a bring-your-own container store, I'm certain that customers will bring a large variety of unique containers, each with unique weight ratios. The checkout guy would obviously be overwhelmed because he has to guess how much each container weigh when they're empty vs. the filled product inside them. If you're interested, please check out my video: https://www.youtube.com/watch?v=_dlOij6XM0s
Thanks for the comment! I can see that a lot of people are having similar ideas for this model which I found to be exciting!
It would make much more sense to exchange containers instead of tossing them away, because why would we throw away something that actually can be used again? Containers do have value to them, after all.