https://gsioutdoors.com/products/h2jo-filter
Put a week's worth of grounds in the bottle, screw on the filter, pour in some cold water, steep for 24h, and transfer to another bottle. If somebody wants "drip" strength they can cut it with water, hot or cold.
I don't get the fascination with paying exorbitant prices and constantly complaining when it's next to zero effort to make it at home, cold or hot. And the best part is you get to choose where your beans come from, you don't have to worry about the political slant du jour of the coffee shop, and you can do it all for a fraction of the price even when using the most expensive beans.
I can't say this has ever been an issue for me. Generally, they just want to sell me some coffee.
If you object to the word “risky” I used it in the sense of “uncertain you will get the value you expected”. Perhaps there’s a better word.
Why is this a bad use of money? When I go to a restaurant and give them $20 for dinner, it’s not like I’m getting $20 worth of ingredients.
It sounds like you just don’t like gambling?
Presumably the taste should tell you whether it's correct. Otherwise why care if they fake it?
In the same cafe on the same day, the reason different drinks have noticeably different caffeine content comes down to the different doses and concentrations they end up using. E.g. 20g coffee would normally produce either a 40mL espresso or 12oz drip. So putting that 40mL espresso in a 5oz cappuccino is much more concentrated than a 8oz filter.