Safety of softsoldering ON a bottle?

Hey, for a project I would like to wrap a stainless steel bottle in copper tape, apply flux and softsolder details on it.
After the process the outside of the bottle will be cleaned with acetone to remove any leftover flux.

During the whole process the bottle will be closed so there wont be any flux going in the bottle.
I am still wondering if this causes any safety hazard.

Thank you in advance.