I'm travelling with my son in a couple of months and he is on growth hormone treatment. The GH needs to be kept cool/refrigerated while not in use and I have purchased an icool medicube which will keep it cool enough for 36 hours which is more than enough. However it was delivered yesterday and I've realised that there's not enough room to pack 8 pens in original packaging which I believe is required. It will easily fit the pens on their own. Has anyone travelling with medication without it being in the packaging? I've got a drs letter and the pens themselves all are labelled by the manufacturer with the drug that is in them. I can take the boxes with me but it seems like a waste of space. I really don't want to buy or take another cooler as it's quite heavy as it is with the ice blocks.
Any recent experiences would be welcomed! We're travelling from Australia to UK and transiting via Singapore.