According to Blackman, if biofilm is ignored, millions of bacteria will keep exchanging the genes of resistance to antibiotic and bacteria encased in a biofilm can be up to 1,000 times more resistant to disinfectants than planktonic bacteria.

But not those at the China International Consumer Products Expo held in July in Haikou, Hainan province, where US tech company Dell Technologies displayed a laptop encased in 100 percent environmentally friendly packaging materials.

Each box contains a brush, a miniature shovel and a replica of one of the museum's cultural relics, which is encased in a clod of earth, in a can.