The product is quality, and the 'successful visual effect. The opening is just enough to slide the neck of a bottle, standard: the others will not pass (the same time, this concerns a limited number of bottles of models). A possible improvement: that the part falling after the neck (Agauche pictured) is not rigid, but flexible on the contrary, as a string. This would increase greatly the effect that would be simply stunning. As it is, it's still very nice and does not at all cheap.