All you have to do is add liquid to the B&M wizard-themed items for the trick to work CALLING all Harry Potter fans! You can now get a magical glass and mug that change colour when you add liquid… and ...

Have you ever seen a mug that changes colour once a hot drink is poured in? Or a ring that is said to change colour with your mood? Both of these items use thermochromic materials. These substances ...

The day doesn't begin until you have a steaming cup of joe. If you think about it, giving the morning beverage a human's name is sweet, if not a little strange. Urban legend has it the nickname can be ...

Both of these items use thermochromic materials. The colour of these substances is affected by changes in temperature. This effect is usually reversible, meaning the material returns to its original ...