I'm re-doing my laundry room and I'm wondering if anyone has experience with
"Flood Saver" washing machine drain pan?

http://www.floodsaver.com/

I had thought about simply installing a shower pan - it would be cheaper -
but this is specifically designed for laundry rooms. One of the things I
found most interesting is their method of preventing the P-trap from drying
out - use vegetable oil in the P-trap instead of water - it won't evaporate.

Any suggestions?