This heat is defeating even the best of us. So what better time to create the perfect refreshing cold brew, you won't have to leave the house to grab. 
- Choose a coarse ground coffee, similar to that of a cafetiere 
- Put it in a container and fill with water, tap water will do at a 1:8 Ratio of Coffee:Water
- Leave out to stand for 24 hours at room temperature
- Then strain, ideally with filter papers and store in the fridge from there.
Your Cold Brew should last a month.
If you want fruitier flavours go for Colombian, Burundi or Ethiopian coffees.
If you want something smoother and chocolatey Peruvians and El Salvador coffees work great. 
Any quality coffee will work just fine, but we'd like to recommend ours.