|The best Waterproof speakers out there are ECOXGEAR. I have one my self and its just amazing.|
There are two bluetooth models
ECOXBT which can float on water for as long as you want but not Fully submersible in Water. It is waterproof to some extent.
and ECOROX which is fully waterproof and it is Fully submersible in Water.
The links to both these speakers are
ECOXBT (FLOATING) http://ecoxgear.com/ecoxbt/ecoxbt-t...
ECOROX (FULLY SUBMERSIBLE) http://ecoxgear.com/ecorox/ecorox-t...
Hope this helped.