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It's a kind of portable toothpaste with its outer layer made of solidified dentifrice and inner layer made of common toothpaste.
Otherwise, its much more interesting for oral cavity health, especially for children.
Its more environmentally friendly than traditional toothpaste. User just needs to buy simple package version, putting in the first-time-bought bottle or box, or idle container at home. And it avoids the waste from traditional toothpaste bags tail.
Xiaolin Guo, Yu Zhang, Linkai Tao, Pengxiang Jia