The necks on beer and soda bottles are there for a reason
The neck of a beer bottle or a glass soda bottle was created with a specific purpose in mind. Manufacturers sought to ensure that their drinks stayed as cold as possible for as long as feasible.
Patrons will hold the top of the bottom, where the least quantity of beverage is stored, because of the long design form with a narrow top. This prevents the beverage from heating up too soon and spoiling the flavor.