I purchased a blue sandbox which I use as a pool for my 5-month old Rhodesian Ridgeback puppy.  She is big, full of energy, and bites everything.  I was concerned she would destroy this pool immediately.  However, it is very sturdy and she enjoys the warm summer days jumping around in the water.  It is a perfect size for a growing puppy who will get to be about 75 lbs.  I am very pleased with the purchase and glad I spent a little extra on a pool that will last.