National leader Simon Bridges has been labelled "blissfully unaware" after signing a nitrous oxide canister, an item that is often used as a recreational drug.
A picture of the signed canister, known as a nang, was posted to social media, with the owner writing: "Got my nang signed by the blissfully unaware Simon Bridges".
Otago University's student magazine, Critic Te-Arohi, also posted a photo of the image with the caption: "NANG, SIGNED BY SIMON BRIDGES: $666. Message page for more info. Serious enquiries only."
The owner says she "told him [Simon Bridges] it was an urn".