Do suction-cup shower mats work on textured or stone tubs?

No. Across the reviewers we read, the consensus is that suction-cup mats only adhere reliably to smooth acrylic, fiberglass, or porcelain. nytimes.com explicitly notes that even the best suction mats fail on textured or tiled surfaces, and r/bathrooms threads echo this. For textured tubs or stone tile, look for a weighted mat designed without suction cups, such as the SlipX Solutions weighted option.