The 'bag' idea wouldn't work with<em>assimilation</em>, exactly - since Petra converts living things (bioware) into noetic energy which she stores inside her own noetic field.  Anything that is either not alive or else not formatted to her can't be turned into noetic energy for storage.  Most living things (people, plants, etc) can't be formatted by a psion; and some key bits of biotech (such as the Odyssey) are 'hybrid' creations, incorporating vital bits of 'hard' technology - none of those can be assimilated.<br/><br/><em>But</em>... she could 'compartmentalise' something: there's 'space' available in the human body, and while she can't really do much to change her own shape, she can rearrange how things are organised internally: so if the bag could physically fit inside her, yes she could store it in safety - shielded by her own body's adaptative capabilities.  No picnic hampers, but a couple of flasks or small bags should be fairly easily managed. ;)<br/><br/>And it could make having company on a field trip all the more enjoyable!<br/><br/>And IRL... I wish that I could cook!  I'm in envious awe of those who aren't hopeless in the kitchen. ;D