Ideas
Explore the world's #1 largest database of ideas and innovations, with 399,891 inspiring examples.
Trend Reports
Discover why 1,037 brands rely on our AI-powered Trend Reports to get better, faster insights.
Newsletter
Join 324,042 subscribers who rely on our weekly newsletter to keep up with need-to-know trends and insights.
Consumer Insights
Uncover major shifts and emerging opportunities with our exclusive PRO research.
Trend Reports
Discover why 1,037 brands rely on our AI-powered Trend Reports to get better, faster insights.
Newsletter
Join 324,042 subscribers who rely on our weekly newsletter to keep up with need-to-know trends and insights.
Dashboard
Get special access to premium content, topic tracking and customizable tools through our AI-powered Dashboard.
AI + Human Methodology
Learn how Trend Hunter harnesses the power of artificial intelligence.
Assessment
Enhance your innovation potential with a deeper understanding of your unique innovation archetype and how your organization benchmarks.
eLearning (NEW)
Prepare for the year's ahead with 100+ lessons, tactics, tools and frameworks with our full learning database.
Advisory & Services
Accelerate innovation and ignite disruptive thinking with our award-winning programs and research.
Trend Reports
Get fast, customized trend reports, presentations and deep dives 20x faster than traditional research.
Plans
Get started today with a free consultation, our self-serve tools, or a dedicated program.
Jeremy Gutsche
Ignite your event or virtual event with our CEO, a NY Times Bestselling Author and one of the top innovation keynote speakers.
Our Team of Speakers & Virtual Presenters
Inspire your group with our most popular speakers on innovation, trends, change and futurism.
Custom Training & Events
Bring the Future Festival experience directly to your team or co-hosted custom event.
Contact
Get in touch to learn more, ask a question or submit a tip.
About Us
Learn more about Trend Hunter and how we accelerate innovation.
FAQ
Get answers to common questions about Trend Hunter.
Community
Stay on the cutting-edge with the help of the Trend Hunter community.
Team
Meet the team trusted by hundreds of leading businesses worldwide.
Jobs
Find opportunities to accelerate your career with the #1 Trend Firm.
News
Catch up on noteworthy Trend Hunter news and media mentions.
Join
Build a portfolio and put your trend-spotting abilities to the test.
Advertising
Supercharge your marketing by partnering with Trend Hunter.
Portfolio
Visit your public portfolio and browse your past articles.
Add a Trend
Write up an article and showcase your trend-spotting skills.
My Trends
Edit your articles and see how they stack up on the leaderboards.
Settings
Edit your profile, connect your social media accounts, and more.
Add a trend, customize your dashboard, or track topics.
Future Festival
Innovation Events
Join the world's top innovators at our FREE Virtual events.
Free Webinars
During COVID-19, learn to innovate through chaos, navigate the new normal and maintain work culture from home.
Custom Training & Events
Bring the Future Festival experience directly to your team or co-hosted custom event.
Search our database of 399,891 cutting edge ideas.

Color-Changing Markers

The 'Ink N Drink' Marker Changes Color as Your Coffee Cools Down

— May 13, 2014 — Art & Design
The Ink N Drink markers are markers that contain heat-sensitive ink that changes color with reducing temperature. So now, coffee shop baristas can not only butcher the spelling of your name with a marker that changes color from green to blue, but they can help you know when it's safe to sip your drink so you don't scald your lip.

The marker's default ink is blue; but when the ink is exposed to surfaces with temperatures exceeding 65 degrees Centigrade (150 degrees Fahrenheit), it changes to green.

The Ink N Drink costs only $4 and works with the paper cups widely used in coffee shops as well as ceramic mugs, depending on the thickness of the material. If a mug is too thick, heat won't be transferred to its outer surface and the Ink N Drink won't be able to carry out its magical color-changing trick.
1
Score
Popularity
Activity
Freshness