Which joke was it to see a couple buying water in front of the store one day?

A couple came out of the canteen, each with a bottle of iced tea. Just as I was about to buy water to drink, the woman shouted to the man, "Hey, what do you mean by another bottle?" Without looking back, the man said, "I don't know." So the woman threw the bottle cap on the ground. When I saw this, I thought I met two idiots. When they are far away, I will go to pick them up, blowing the wind and watching the sun. I can see it clearly, in four big words: thank you for tasting …