The suction cup base actually holds firm on a flat surface, which surprised me for something this size. The PVC has just enough give to feel realistic without losing that full 6 cm diameter. Took some patience the first time, but worth it.
Was nervous about the 6 cm diameter but the PVC has more give than I expected, so it's manageable with patience. The 28 cm length is no joke though, definitely not a beginner piece.