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In fact... is it not the same principle that makes small bottles?
There is a gap with the bottle cap, which is inverted
The idea is quite good, and this idea must have been thought of before, but why didn't anyone do it? Because demoulding is not easy to do, blow molding can not come out at a time (the piece of bottle mouth), if you want to do it, you can consider the structure on the bottle cap may be better.
It's good, but I don't know whether it's good to produce it or not.
Good idea, just don't know how to produce, blow molded box can do?
Use traditional characters
Interesting
Wow, this idea is wide