The one we used last fall was an example of a bottle that had an indentation on each side so you could hold onto it. That couldn't be trademarked as part of the trademark. It's a functional design to be able to lift the bottle.
Evidence of meeting #20 for Industry, Science and Technology in the 41st Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was trademark.
A recording is available from Parliament.