loppyfoot

Hey guys,

Is the following piece in the form of a heroic couplet, and in proper iambic pentameter?
And about the piece... don't ask. Busy work project...

This Ad claims this Tequila is flawless,
But many hidden truths it does possess.
One falls over and slurs his speech today,
But tomorrow will not escape these ways.
The noble Britons are like this liquor,
Inner so grave yet outer much slicker.

I have 10 syllables per line, and the rhyme scheme is correct. However, I may need some correcting on the stressed and unstressed notes.

Thanks for your help.