Neptune spies a funeral cortege

Behold a flotilla of coffins, multi-coloured hearses.
The message is the bottle is the S.O.S. is the plea.
Don’t you get that I get really, really nervous
when I behold a flotilla of coffins, multi-coloured hearses?
Your healthy smoothies are giving me an unhealthy surface.
Next time you swig, have a think about the debris.
Behold a flotilla of coffins, multi-coloured hearses.
The message is the bottle is the SOS is the plea.