Which sealed can is better?

Different materials have different characteristics, so it is hard to say which material is better sealed can. Currently on the market, storage sealed cans mainly use two materials: glass, plastic, each has advantages and disadvantages. Glass material, the advantage is safe and non-toxic, suitable for long-term use, and the glass jar overall transparent, very beautiful; But the disadvantage is that the mass is heavy, and fragile, need to handle lightly. Common lead-free glass is used for sealing tanks, ranging from sodium calcium glass, which is not resistant to impact, to high borosilicate glass, which is resistant to impact.