With the OXO Rapid Brewer you can brew hot or cold coffee concentrates which can then be diluted with water or milk.
It’s travel friendly, sturdy & has a built in stainless steel filter so paper filters are optional.
To brew place coffee in the coffee chamber, tamp, add hot or cold water, brew for 2 [hot water] to 5 minutes [cold water], pump the plunger 5 times & voila, add water or milk to dilute to your preferred strength.
Take a look here for some interesting videos & recipes.