Ketchup Dispenser at Restaurants

 In order to reduce the use of single use plastic for ketchup a dispenser could be put that could scan receipts of customers and associate it with their quotas (that would expire at the end of the day). So some people doesn't want too much ketchup, they don't have to take it all while those who just can't get enough would get the maximum quota allocated to the corresponding receipt. 

This should also work for soda and other things such as ice cream. The aplication could also be used for vending machines at buffet. So for an all you can eat buffet there might be a combo package with some certain types of food that are bonuses or not all you can eat. For such purpose a vending machine that could recognize each receipts could be useful. 

Receipts have a lot of potentials, other than those things that I've pointed they could also be useful for promotions or bonuses at other things. If there were applications that would recognize receipts, businesses could cooperate and recognize each others' customers, gave them special treatments. Electronic receipts could be saved or stored so that one day businesses could identify long time customers. 

Receipts could also be used for marketing purposes, one would prefer to toggle what kinds of advertisements they are willing to see at times. Do they felt like exploring something new from completely different authors? Or do they want to browse upon something from a place they usually like?

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