[Anitius Severinus Boethius]

That’s not making the food look bad. Everyone even slightly familiar with show business knows that actors in commercials, TV shows and movies use a spit bucket for takes involving eating. Otherwise you often couldn’t finish the scenes.

[Hulka]

I pity the actors that have to chug a coke. . take after take after take. No spit bucket for them. . .

[MD Expat in PA]

That’s not making the food look bad. Everyone even slightly familiar with show business knows that actors in commercials, TV shows and movies use a spit bucket for takes involving eating. Otherwise you often couldn’t finish the scenes.

Exactly. She was not dissing the company or their burgers, it is just how food commercials are filmed. One also has to keep in mind that the food is sometimes sitting around under hot lights for hours and or may have been made to look better by using various tricks of the trade and substances that are not necessarily edible.

http://www.rd.com/food/fun/food-stylist-secrets/

https://www.theguardian.com/lifeandstyle/2016/jan/04/food-stylist-photography-tricks-advertising