While fish and chips can be a delicious treat, big portions of deep-fried food can mean it delivers far more calories in one meal than most of us need – or even want. This study suggests that it is possible to offer a smaller portion, using standardised boxes to control portion size, without causing problems for shops or upsetting customers. This may also have the benefit on cutting down on excess packaging and reducing food waste. However, this was a small study, carried out in a real-world setting to find out whether the intervention was possible.