Clear Extra Large Tub with Drain Holes and Suction Cups MatPatented Design with Powerful Suction Grip : a bathmat designed to securely stay in place; the patented mat features hundreds of suction cups that effectively help secure the mat to your tub or shower floor.. . Easy Water Drainage: hundreds of drainage holes allow for water to easily flow under the mat and towards the drain, helping to prevent water from sitting stagnant under the mat in your tub. Textured and BPA Free: the mat is constructed from BPA