Yes. Coffee and other hot liquids, like soup, can cause injury.
Discussion
Cars can cause injury. Hammers, too.
In Japan a handful of people choke to death on mochi.
I see the point you are making. With the hammer.. but for the car
If a car was advertised as being functional, yet the brake didn’t work.. who’s at fault?
I think that coffee is advertised to be a drink you can consume. If it’s causing burns of your skin.. to me it seems like faulty coffee.