>>130112>>130114Bamboo is pretty much maintenance free, that's the point. It's essentially organic plastic.
But then you have to understand why it's there. If something hits the bottle neat the opening, chances are it will slightly deform it. Not a huge problem generally, but when the threading sufers from it, is IS a problem. The reason the threading is on the inside of the bottle is, after all, to protect it even more.
So in case of a shock, the inside cap must be able to withstand it and avoid it being deformed. A simple plastic cap will do the trick, it'll hardly deform and hence prevent the threading from being deformed aswell. But a stainless steel cap, despite being tougher, may not, because it's hollow. Hence why the bamboo cap exists, it's pretty much a hollow stainless steel cap, but filled with a bamboo insert, making it much tougher.
It's all about how durable the threading will be.
