Anna Tingley If you purchase an independently reviewed product or service through a link on our website, Variety may receive an affiliate commission. More than 40,000 people have purchased tickets to see “Barbie” and “Oppenheimer” on the same day, according to AMC Theatres — a double feature dubbed the “Barbenheimer.” If you’re one of the movie lovers planning a back-to-back screening this weekend, then you’re well aware that no detail is insignificant when constructing an optimal viewing experience. Only the perfect curation of snacks and beverages and outfit choices will help you endure (enjoy!) the five hour-plus viewing experience (“Oppenheimer” runs at three hours; “Barbie” clocks in just under two).