The context is everything before the comment. “Coffee maker”, in this context, pretty clearly means an automatic drip-brew coffee machine.
It would be like if we were talking about basketball, and I said, “my net is made of chain, as it should be”, and you were to reply, “how dare you, nylon is a perfectly fine material for fishing nets.”
The other sentence in my (apparently single sentence) comment, “As it was for 60 years”, should also have maybe been an indicator of what I meant.