Duozi Heart Kou Sister 2nd Generation Airplane Cup
Kou Sister 2nd generation is actually a hardened version of the 1st generation. The narrow passage is tight from the entrance to the bottom. The dense, practical pleats "bite" the cannon barrel non-stop, providing ample stimulation. On the outside, Kou Sister's huge "umbrella surface" covers all possible contact areas from the testicles to the lower abdomen. It not only provides a wonderful impact experience that general small and medium-sized machines cannot offer, but also avoids the bulky size of large machines, which can be said to be an ingenious design.
