We recently installed new cabinets and a new sink. A few years ago we
saw in Lowe's a preformed plastic liner that came in a few sizes that
fit in the bottom of common sink cabinets. What was nice was it had a
small lip about 1 inch high all the way around the liner. That way if
there was a small leak it would catch it and give me enough time to
fix it and the water wouldn't wouldn't ruin the cabinet.

I went to Lowe's the other day and they don't know anything about
them. I've searched the Internet but cannot find them. Does anyone
know about these things and where to get them?