Qr code Prompt / label

Have you ever bought any stale vegetables. We spend a lot of time to avoid buying any stale vegetables but it's still hard to make a correct choice. With Qr Code Prompt's help things will get easier.
First you can scan the Qr Code to get detail information of the vegetable. What's more the new material Qr code sticker enables the code to disappear as time goes. When the Qr code can not be scanned, the vegetable has already staled. It's also easy and obvious for customers to find out the stale vegetable on the shelf.