Sink mats and sink grids technically do the same thing, as both of them are kitchen gadgets that are designed to protect the sink and glassware from cracking and chipping. And while some people might use the terms “sink mat” and “sink grid” synonymously, they’re different in their composition. Sink mats are often made of soft and pliable materials that resemble bathroom mats while grids are often made of stainless steel and focus more on protecting the sink rather than the glassware.