New York City has passed regulation banning the sale of giant-sized sugary drinks.

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The regulation says places with soda dispensing machines can only stock cup sizes up to 16 ounces. Professor Diana Winters with the IU McKinney School of Law says while people can still get refills or buy more than one drink, the size of a consumer's default options affects how much people drink. She says evidence shows it's possible to change behavior by changing people's choices.

Winters says lawsuits against these types of regulations may not be successful because the regulations need to show they have a rational basis for them. She says research linking high consumption of sugary drinks to obesity may prove that rational basis.