They still need different prints etc. They’ll try to rationalize that part, but they still have to pay attention to regional preferences. I don’t even know if the sizes are all the same here in EU. In Germany the most common bottle sizes are 250ml (1l/4), 330ml (1l/3), 500ml (1l/2), 750ml (3l/4) and 1l afaik. 200ml (1l/5), 375ml (3l/8) and 2l also seem to be a thing. 33cl is the standard for beer and 75cl for vine. My measuring cap for my cola syrup has markings for 250ml, 500ml and 1l. As well as 615ml and 840ml because of Soda Stream bottle sizes.