Safety 1st Sure Fit Toilet Lock

The weak suction cups simply aren't strong enough to hold it to the tank. It's constantly falling off.

99% of toilet bodies are curved, this item has 2 suction cups, which would work great, if it weren't for the fact that both suction cups are equally alligned. Not sure how they tested this item when going through the bother of building it, but they obviously didn't test it on a toilet or a 7 month old baby who ripped it off the toilet the only time I was able to adhere both cups!

I'm happy with these so far. There is no tricky installation that requires removing the toilet seat, and they don't get peed on like some toilet locks. The suction cups do become loose every week or so, but it only takes a few seconds to re-affix them to the toilet. And the price is right.