Yes, the YOU carry it on bit is very important. It is not allowed to be checked.
Will the porters offer to tag it as checked? Yes. Anything for a tip.
Have people done it? Again, yes.
BUT if that water bursts - which it very easily could as they don't stack luggage neatly by weight when loading it into the ship - YOU will be the one held responsible for other people's things that your water damages. And given that there would be a tag with your room number on it, it's VERY easy for them to trace.