AmazerBath Bath Tub Mat, Medium Size 27.6 x 15 Inches Non-Slip Shower Mats with Suction Cups and Drain Holes, Bathtub Mats Bathroom Mats Machine Washable (Clear Gray)

For SMOOTH Bathtub Floors ONLY - NOT for textured surfaces

149 suctions on the bathtub mat used the Vacuum Theory to make it possible to attach the proper bathtub firmly, the same method is used to store the shower mat after shower: you can adhere it to a smooth floor with some of the suctions effortlessly