Blankeys to the rescue!
Fortunately, we found an ingenius solution! We sewed 2 pieces of the organic bunny quilts (L) together and placed it around the litterpans. It worked out great -the quilts soak up the urine without allowing seep-throughs (prevent stains on floors), allow Bunny Feet to stay dry and clean, and also stop Bunny Feet from spreading the pee mess to the rest of their home.
Whats best is that the quilts are washable and can be used over and over again, letting us do our part for the environment.
Do check out the Bunny Blankeys and Quilts in the toys section.