7-Eleven Smoothie

I don't usually go to 7-Eleven much, but when I went for the first time in a while, I saw a few smoothies I hadn't seen before. Among them, the one that caught my eye was the "Calamansi Smoothie." Calamansi... what is that? So I decided to buy it. It's like grapefruit, like orange, like sweetie (nostalgic). It has a faint bitterness. In short, it's a citrus, but looking closely, it also contains orange and lemon. I wonder what the actual calamansi flavor is? I have no idea (lol) But it was delicious😊