I agree and this will likely become a warning at point of vend (along with reams of warnings that any lid is not a guarantee of safety etc. ) We accept all sorts of limits on design because it makes sense. Sell by and eat by dates,, weight limits on carbon frames. We cannot "design out" all of the imperfections of life and at some point need to accept personal responsibility. If it rains hard and you are wearing a Chinese lantern lid...it will likely cease to meet the design criteria, so go fetch another or take it off.