The Boston Beer Co., makers of Samuel Adams, have posted a voluntary product recall due to a very small percentage of bottles having manufacturing defects resulting in "random presence of bits of glass, most the size of grains of sand, but some small slivers in some bottles as well."

According to their recall website and FAQ, the affected bottles are embossed with the digits “N35” followed by the letters “OI”. Bottles with this coding should be not be consumed.  Consumers can claim a refund for bottles with the “N35” code through their website.

More details about this recall at Sam Adams website http://www.samadams.com/cidefault.htm