In the UK we're currently experiencing the hell that is summer (I can't cope in temperatures above 20C, mock if you wish) so wanting to get more into cold brew.
Anyone got any recommendations on the best piece of kit to do it?
A cold brew "maker" is not a complex thing. All you need is coffee grounds sitting in cold water for a day or so. This can be accomplished in multitudinous ways.
We have a gallon jar with a tap at the bottom and a tall 3" diameter mesh filter with a flange to sit under the lid. I had to (food-safe) solder the filter back together after a few years, but it makes a huge stack of strong brew with which we are most pleased.
Yeah. Literally any glass jar will do the job. Add water. Add grounds. Shake. Refrigerate. Run it through a coffee filter or fine seive into another jar. Done.
You do not need a single purpose contraption for this task. This feels like consumerism.
TBF, we have a dedicated setup for this because we like having cold brew available at all times. It's worth a little investment in something permanent if it's going to be in constant use. A metal filter does the job for 90% of the gallon jar, and we pour the bitter dregs through a paper filter at the end of the week.