Question

How are an empty glass bottle and a glass candlestick that were created from crushing and melting glass alike and different?

Answer 1

they are 2 different item's glass is glass but what you make out of it is what counts

Answer 2

although its the same material, the process and the creation of that product is the main difference. another is their functions and ability. one could be more durable, the other could be more useful, etc.