ReaTMix ---- Ready--- Tea---Mix sounds creative
But is sounds very far from tea, we need a name that is close to Tea so when people head the name they know that product is a tea
Imagine yourself hearing ReaTMix from your friend and try to imagine what kind of product is that
I would go for Milk Ocha, simple
Ocha is a japanese word for Tea, so it's Milk Tea
Or maybe White Ocha