To me, as long as you're drinking a bottle of water with it I see no harm. You get hydrated from coffee. Of course you need to drink water in general, but the concept of drinking cups of water to balance out dehydration from coffee is just a myth.
Reptiles do not maintain their own body temperature within a narrow range like mammals and birds, so controlling their environmental temperature is critical for normal activity and good health. Reptiles are poikilothermic-which means that their body temperature alters with the surrounding environmental temperature.
Salamanders are amphibians, like tadpoles, that are able to regenerate parts of the spine. If the spinal cord is overly damaged or removed, the tail doesn't regenerate. Lizards are reptiles that are able to regenerate their tails after voluntarily disconnecting them from their bodies in response to a defense mechanism.