Dina I love how you accessorised your dog potty!
And your babies always look great! Little Pia looks good no matter what she's doing!! Thank You for posting about this. It's always nice to get a first hand review.
I found a couple other doggie potties. Some even use grass-like sod. Here's a couple of links...
Soiless Dog Sod Penthouse Dog Potty - an indoor dog toilet | Cosmopolitan Canine Patio Potty Indoor Dog Potty - Housebreak Your Puppy! INDOOR DOG POTTY for: dog house training, housebreaking puppies, dog and puppy training