1, first of all, buy the Lao Gan Ma, you find, the inside of the bottle cap, there are several is to the inward concave buckle, this is so that the bottle cap can be fastened to the bottle mouth design, but also because of this buckle, resulting in can not open the bottle cap

2, these several buttons is to open the bottle cap the key to the bottle cap, you take some hard objects, such as kitchen knives handle, shovel spatula handle, micro force knock bottle cap buckle above, the buckle The upper knock concave down, each bottle cap has three internal buttons, so knock three places, you can easily open.