We’ve got water sensors with alarms throughout the house…all connected to an automatic shutoff valve at the source into the home.

This came in handy when we suffered a leaky dishwasher hose last year…especially as we have drawers under the kitchen sink.

For our custom kitchen cabinets we had a metal lining installed by the cabinet maker. For our laundry room we purchased this Rev A Shelf cabinet drip tray. It is supposed to be to trim to size, but we wrestled with that sucker to cut it down.

https://www.wayfair.com/storage-organization/pdp/rev-a-shelf-polymer-trim-to-fit-vanity-sink-base-cabinet-drip-tray-rsef1837.html?piid=29100022%2C29100024

Just this weekend I was looking for an under the sink tray at Home Depot for our new condo kitchen and bathroom sink. But, they only sell them online. (The store is gigantic, I'm often astonished at what little they carry.)

I might also see if any boot trays or sheet pans are the right size.

Thanks. The Gorilla Grip mats seem to have good reviews, especially from people who have to cut them to accommodate supply lines coming uo from the bottom of the cabinet (which is the situation I am in).