Value Proposition for goods, how does it work?

I suck at seeing this things. But say you're selling a non-digital product, let's say "tea" the drink.

They say that value proposition is a clear statement that offers three things:

Relevancy. Explain how your product solves customers’ problems or improves their situation.

Quantified value. Deliver specific benefits.

Differentiation. Tell the ideal customer why they should buy from you and not from the competition.

How does the work in terms of "tea"!!!! I can't see how tea would solve a customer's problem :/

I think I might be the worst marketer in the world.