doubleKO said:
People don't tend to call other colas Coke,
RedFive's map proves this wrong actually. Coke used as a generic term for all carbonated drinks, not just cola? That's definitely a bit weird.
Things with three or more common terms:
soda/pop/soda pop/soft drink/fizzy drink/Coke
candy/sweets/lollies
ketchup/catsup/tomato sauce
yiros/yeeros/gyro/kebab
bologna/baloney/polony/devon