You can also brew cold in a "French press" or in any old jug and filter through a reusable "tea sock." Maybe just as convenient or more.
Positive Product Points
I'm very happy with the cold brew coffee I've made just improvising with stuff I had around in the kitchen.
Negative Product Points
I've never used the Toddy.
You can also brew cold using a conventional "French press:"
Pour in cold water instead of hot, use a "cold" ratio of grounds to water and let it stand for hours instead of minutes.
Or use any old jug and filter the soupy slurry that you left to soak overnight through a reusable product called a "tea sock."
These options seem likely to be at least as convenient as a Toddy (although note I've never used a Toddy).
A popular ratio of grounds is 8 cups of water per pound of medium-fine coffee grounds brewing at room temperature, which netizens say comes from the Toddy Website.
The ratio I use is one part grounds to four parts water, by volume.
I stop to stir the grounds up into a paste after I add just some of the water, which is an easy way to avoid clumps and mix thoroughly, and then I stir again after all the water is in. I think that's from the Toddy site too, but it's also standard practice for lots of things.
Sort of nice not having to buy anything new to brew coffee cold, but what now to get my gadget fix?