You would not be able to put a chocolate bar it in your pocket or bag. If you hold it in your hand, you would reach the house with a piece of chocolate completely different from what you have bought.
You might not be able to give a chocolate bar as a gift and you won’t be able to buy it in summer or even in winter!
What would you do?
Go shopping with an empty plate or keep a plastic bag in your pocket during your time out, just in case you enter a store. You can eat as much as possible at the shop before leaving as an alternative solution.
Do you have any other suggestions?