plastic

Benefits:
-Glass may be formed into more smooth and impervious surfaces than plastic
-Glass, under compression, can withstand a greater amount of force than plastic
-Glass is more heat resistant than plastic
-Glass has a higher index of refraction than plastic
-Glass is more anti-corrosive than plastic
Disadvantages:
-Material cost of glass is more expensive than plastic
-Production cost of glass is higher than plastic

see:
http://en.wikipedia.org/wiki/Glass
http://en.wikipedia.org/wiki/Plastic
do a table if not (問題已經被發問者自行移除) as you did before.