2.MADE FOR GLASS, TILE & MIRROR — Use these shower suction hooks on glass shower doors, glazed tile, mirrors or polished marble. These glass suction hooks also work on compatible smooth glass windows, giving you flexible hanging space without drilling. TOWELS, ROBES & LOOFAHS — Use each suction cup towel hook as a shower hook for towels, a robe hook for the wall or a loofah hook inside the shower. The rounded hook creates convenient hanging space and keeps frequently used bathroom items within reach.