Actually, the specialty sodas are packaged that way all the time. Four pack, glass bottle, twist off top....
Indeed. But notice it is the "specialty" sodas.
Not the sodas that account for more than 99% of US soda consumption.
If you spoke to the consultants who were behind that specialty packaging, they would likely tell you that theyw anted to create a mental association in the minds of potential buyers of their specialty soda with beverages - like craft beers - that are usually more expensive than your typical 99-cents-for-2-liters cola.
And the beer companies that sell beer in plastic bottles (like Budweiser) specifically maintain the shape of their glass bottles in order to remind people that it is still beer even if it's in plastic and to avoid getting in trouble with regulators by not going with the cheaper, less-plastic-intensive soda bottle shape.