How Tasty Is Cold Coffee For Hot Days?

I am going to a small café this afternoon. I see a glass of cold coffee on the table. I sip it and it taste creamy but a little bitter. Some ice cubes float on top and make soft clink sound. I feel curious because it look simple but refreshing. Some coffee foam melt fast.

I am thinking why cold coffee is popular now. People dont just drink hot coffee anymore. I feel curious because some cold coffee taste good but some watery or too sweet. Maybe coffee quality and milk matter more than cup design. It make me wonder if all cold coffee are same or some are really better for taste and refreshment.

I take my phone and start checking while scrolling many online marketplaces including alibaba. I see cold coffee powders, ready packs, and machines in many types and sizes. Some small some big. Some sweet some bitter. I read few reviews where people say some cold coffee taste rich and creamy long others taste weak or melt fast. It feel like picking right one really matter if you want tasty and easy drink at home.

Now I am thinking which cold coffee is really better for daily drink and refreshment? Are small instant packs more usefull or big ready mixes better choice?