I cling film it. I've got an ingenious method for obtaining suitable sized cling film. Go to the kitchem and wrap about a metre of clingfilm around a biro and there you have it your own portable clingfilm tube. It seals the smell I just stick the wrap in my sock and go out with some rizla in my pocket. sorted. If your paranoid you can by smelleliminating baggies but Ive never bothered.