In a mug place 50-150ml of cold brew in a cup
Add ice cubes
Fill with milk

Or

50-150ml cold brew in a cup/mug/glass
Add ice
Cold water for a black cold brew

Or

Straight

Or

50-150ml cold brew
Add ice
A citrus fruit of your choice for something different

Or

Add coke to your cold brew  and water for a weaker version

Add orange zest and orange slice