So I'm an avid coffee drinker but it's my first time getting tea at Starbucks. I'm discussing with the barista, trying to wrap my head around the pricing model. They have tall, grande, and vente. You get only 1 tea bag no matter what size you choose, so the only difference is more water = weaker tea.
1) Why am I paying more for weaker tea?
2) Will they refill my cup with hot water when I finish my tall?
3) Will they give me a vente cup filled with hot water on the side?
Please explain.