How can I mimic BigK’s diet green tea with citrus flavor?

I usually hate green tea (and I've tried adding lemon to it), my dad bought this on sale, but I'd never be willing to pay the full price for it. It tastes like a light, green tea lemonade.

I've tried making lemonade with green tea water, but it comes out tasting too sweet.

I've also tried adding lemon to green tea, but it tastes… too organic.

I can't find the right balance.

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