In the US, I think making soda expensive enough that bundling 32oz of it for an extra $0.75 with fast-food combo meals stopped happening, and free refills becam

In the US, I think making soda expensive enough that bundling 32oz of it for an extra $0.75 with fast-food combo meals stopped happening, and free refills became uncommon again (they were rare as recently as the early 90s! You paid per cup, or you bought a pitcher, like beer!) would probably do some good.