I'm saving $100 a month that everyone else is throwing away at Starbucks

Summer's on, and the last thing most of us want on a balmy 80-degree morning is a steaming hot cup of coffee.

Thankfully, trendy coffee shops have popularized cold brew - a super-concentrated coffee "tea" that is filtered from coffee grounds that have steeped in cold water for hours. It is served over ice.

But there's one problem, cold brew is really expensive. A small cup in New York City can set you back $4.

And what coffee shops don't want you know is that it's super easy and cheap to make yourself. It also saves a ton of time in the morning.

There are many different ways to make cold brew from home, but this method is cheap, easy, and nearly painless to clean up.

Here's how to enjoy cold brew every day for a fraction of the cost of buying it at a shop: