1. Those Stripes Aren't Grain. That's Glue.
The first thing I check is the edge. Straight stripes aren't grain. They're bamboo strips glued together.
That glue is often formaldehyde-based, and it sits in your boiling pot every night. The seams are where bacteria can build up.
An ACAWOOD spoon is carved from one solid block of acacia. No glue. Just grain.