Can - Pepsi
Glass Bottle - Coke
Plastic Bottle (like 20oz) - Pepsi
2 Liter - Coke
Souvenir/Paper Cup/Mug Fountain (like at theme park) - Pepsi
Plastic/Foam Cup/Self Serve Fountain (fast food) - Coke
Restaurant’s Glass - Coke (close call tiebreaker)
Coke seems best to me when the drink isn’t the meal, when you just need a non alcoholic non milk or whatever liquid.
When craving hydration say walking uphill a mile from the back to front exit of the Washington DC Zoo, a picturesque sweaty crispy iced like magazine advertisement Pepsi is a sugary godsend.