The British supermodel arrived at her North London home holding two small plastic bottles - featuring a skull and crossbones warning on the lids, a design which bears a resemblance to the potent substance which is also known as ‘poppers’ on (12/10/08)
Legal drug amyl nitrate is also popular among clubbers who sniff the vapors to get a head rush. It is often combined with other drugs.
Earlier that day, Kate - who is dating rocker Jamie Hince - had left home to enjoy a shopping spree.
Upon her return, along with the two bottles, the 34-year-old supermodel was also carrying a bag containing exclusive Diptyque candles.
Kate isn’t the only celebrity to be linked to poppers recently.
Sarah Symonds, who alleges she had a seven-year affair with Gordon Ramsay, claims the controversial TV chef used the substance during their sex sessions to enhance his performance in the bedroom.