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