An appeals court hears arguments Wednesday on the future of Philadelphia's landmark tax on sweetened drinks.
Three cities in California, as well as Boulder, Colo., adopted taxes on sugary drinks, a move aimed at combating obesity.
Three California cities are voting on one-cent-per-ounce soda taxes, while Boulder, Colorado's two-cent-per-fluid-ounce tax would be the highest in the country.
New York's highest court decided on Thursday that the city's health department could not impose a cap on the size of sugary drinks.
New York City's ban on sugary beverages was struck down in appeals court Tuesday.