Can it be harmful to drink from a glass that is cracked although there are no sharp shards?

It can be harmful to drink from a cracked glass, even if there are no sharp shards visible. Here's why:

* Bacteria growth: Cracks provide a haven for bacteria to grow and multiply. These bacteria can contaminate your drink and make you sick.

* Chemical leaching: The glass itself can leach chemicals into your drink, especially if the crack is deep.

* Hidden shards: Even if you can't see them, microscopic shards of glass might be present within the crack. These can cause cuts in your mouth or throat.

* Structural integrity: A cracked glass is structurally weakened and can easily shatter if dropped or bumped.

It's always best to err on the side of caution and discard any cracked glassware. Even if you're not immediately concerned about the risk, the crack will only continue to grow and weaken the glass over time. It's not worth the risk to your health and safety.