Nắp đậy lon nước đa năng

a can cover for sodas or beers to keep bugs like wasps out, prevent spicking or to recognise your soda, for the symbols you may need to sand the edges

to use you just rotate the cover so it doesn' t cover the hole otherwise you rotate to cover the hole 

for the braille the letters are capital and the edge is the botom 

no AMS or MMU required