Soda water with "natural flavor"

Kashrut
1

Someone purchased several sparkling water beverages by Market Pantry for me from Target. They all contain “natural flavor”. Are they Kosher?
Naturally Flavored Tangerine Lime Sparkling Water Beverage: Carbonated water, citric acid, potassium citrate, Natural flavors, potassium benzoate, sucralose.
Naturally Flavored Strawberry Lemonade: Carbonated water, citric acid, natural flavor, potassium citrate, potassium benzoate and sucralose.
Unsweetened Raspberry Blackberry Sparkling Water: Carbonated water, natural flavor. Thank you so much!
Debby Segura

2

Kosher

3

Thank you! Sucralose needs no hechsher, right?

4

correct