A couple weeks ago, I found these two bottles tied to a stick on Seawall Beach in Galveston, Texas.  I think they were probably used as floats.  I have found about six of them since I started beachcombing.  Most of them have two bottles, but I found one with six plus the top of another.  I found two bottles tied to a rope and I think they are the same thing.  Every clump of bottles tied to ropes that I have found is from Haiti.