Yiwu Sansheng Toys Co., Ltd .
A kind of pressure relief ball is quite popular in white-collar. It looks like a common ball. It will appear a lot of bubbles after squeezing. One by one is like a grape, which is named as the vineball. When there are white-collar workers, they say bubbles are like "viruses" and feel a little "dense phobia". Pinching can really relieve pressure.