Nitrous oxide canisters / cream puff chargers and balloons: steel cylinders contain nitrous oxide / laughing gas which is used for legal high Stock Photo - Alamy
People getting high on laughing gas don't realise it's deadly | Daily Mail Online
Hippy Crack High Resolution Stock Photography and Images - Alamy
Cream Canisters Btn (@BalloonsBtn) / Twitter
Nitrous-oxide: Laughing gas hits a new high in Ireland