Unfortunately, unless you’re walking around with spikes on your feet, you are always going to be vulnerable to slipping on something. There are certain substances that are more slippery than others and walking on them the wrong way can lead to a slip.
What these shoes do is give you a much higher level of traction to make it much less likely to slip on such things as food and water. No slip resistant shoe will guarantee that you will never slip on anything, but these shoes are going to be your best bet.