I believe tea accessaries made of bamboo started some 20 years ago. Actually my uncle was among the first several who adopted this material in this direction.
I have had some experience with bamboo "tea table". It could crack here, especially in overheated apartment in winter, if the quality isn't good (though this isn't a problem in humid Taiwan at all). Cheap imitates from mainland China tend to crack rather easily. My advice is buy a good quality one and make tea everyday with it.