According to US media reports, the collection of Barney Smith, an octogenarian in San Antonio, Texas, USA, is definitely a "cold potato" in the diverse collection world. Since his retirement from the position of plumber, Barney has collected all kinds of waste toilet covers and carefully carved or pasted various artistic paintings on each toilet cover. So far, Barney has collected about 700 colorful toilet covers and transformed his garage into a "toilet cover art museum". Barney's weird collection was strongly opposed by his family, but the ambitious Barney vowed to carry out his toilet cap art to the end. He decided to collect 1000 toilet caps and then apply for Guinness World Records.