Same here. I've been to enough restaurants where a bag of tea is $5.
I've thought about doing the very same thing BUT a minor change. I've noticed that the water the ship provides for HOT tea would be an excellent choice to use IF I brought my own instant coffee in packets. However I dread the headache of dealing with BIG brother (TSA) after having the same problem last month on our CCL Miracle cruise to Alaska out of SFO when I took powdered coffee creamer in my carry on. The TSA agent just could NOT understand why I'm bringing this on a cruise when they provided something similar for FREE? If/so/facto this powder must be DANGEROUS ! He as much said so, when he declared.' Well.. I have to check this out and see exactly what it IS !' I told him to go ahead , do whatever he needed to do. He opened the container, sniffed it, eyed it with suspicion, swabbed the bottle cap, running my dangerous white substance through his machine, only to find out it was harmless. But, the it almost made me miss my flight to SFO. Therefore, I've wonder iif it's all worth it, just to have HOTTER coffee ?
Mac