I disagree. It's only sentimental if Aeryn does it consciously. If they were dumped back into a crate on Moya that Aeryn found then it wouldn't necessarily be sentimental so much as prudent: waste not want not. OTOH, if this story is going where I assume it is, do you think Aeryn would have wanted to save something of John's for Anix, when and if she ever tells Anix about her father? Particularly given how much canon Aeryn prized what little she knew about her parents?