I got the essential brewing kit about a week ago. After using the bamboo whisk twice, I noticed some splinters were starting to form. I contacted craft tea fox to check if that was supposed to happen but they said it is not normal and immediately sent a replacement to me. Upon receiving the new bamboo whisk, I still noticed some splinters on it. I guess I should not expect it to be in a perfectly splinter-free condition as it is made from bamboo. But I still wouldn't feel safe to use it in my drink as there might be some splinters that could fall off into my drink.
The matcha and hojicha powder was good though. Fragrant and creamy.