can i save flatbuffer bytes and reuse later?

[vbpatil449]

I have queue that will cache message(items) and i want to save flatbuffer bytes for each message in this queue.
Later i want to read through all the messages in the queue and make a FlatBuffer bytes that will contain each message bytes..
Example:
I want to save each "Message" here in a Queue List and later time when i have say 100 items, i want to build PostRequest flatbuffer final bytes.

table Message {
items: [string];
}

table PostRequest {

/// messages in the batch
messages: [Message]
}

Is this possible? Any suggestions ?
thanks