Links hay tháng 7/2022 Đang cập nhật ... https://www.businessinsider.com/ink-n-drink-coffee-temperature-ink-2014-5https://www.businessinsider.com.au/ink-n-drink-coffee-temperature-ink-2014-5https://www.businessinsider.in/this-company-has-solved-the-six-century-old-problem-of-why-we-burn-our-tongues-on-hot-coffee/articleshow/35074101.cmshttps://www.businessinsider.in/This-Company-Has-Solved-The-Six-Century-Old-Problem-Of-Why-We-Burn-Our-Tongues-On-Hot-Coffee/articleshow/35074101.cmshttps://kenh14.vn/la-cool/but-viet-da-quang-thay-doi-mau-sac-theo-nhiet-do-20140514050855789.chnhttps://www.trendhunter.com/trends/ink-n-drinkhttps://gizmodo.com/color-changing-markers-let-you-know-when-a-hot-drink-ha-1575591365https://www.gizmodo.com.au/2014/05/color-changing-markers-let-you-know-when-a-hot-drink-has-safely-cooled/https://www.niusnews.com/=P3ju8282