Product Name: Tetris Heat Changing Mug Price: $14.99 Who would like this?: Old-school video game enthusiasts, geeks, coffee lovers, caffeine fiends, easily-entertained children
The Tetris heat changing mug is not your ordinary mug.
Sure, it does all the things your favorite mug already does. Will it hold your piping-hot coffee? Definitely. Your spicy chai tea latte? You bet. Your kid's peppermint hot chocolate? Sure thing.
So, what's so cool about this mug in particular? Its perfectly geeky heat-changing feature, of course. When you pour a hot beverage into the mug, its heat-sensitive coating comes to life. Before you know it, the once empty Tetris matrix printed on the mug's sides are filled with blocks of all sizes and colors. According to the mug's manufacturer, the blocks will stay vibrant for up to 30 minutes while you sip your cozy drink.
We know, we know — heat-changing mugs are no new thing. You remember the first time your dad brought one of these babies home when you were just a little kid. "Mugs are lame, dad," you said. "I don't even like coffee yet."
But when your dad filled it to the brim with hot coffee, that seemingly simple mug went on to blow your tiny little mind. Now it's your turn to blow someone's mind. As they say, it's the simple things in life that are the most extraordinary.
If you don't believe us when we say this Tetris mug is the coolest thing to happen to hot drinks since the invention of coffee, then let the Internet convince you. Check out the clip below, which shows the mug in action.

Pretty great, right? Even the harshest of cynics will have a difficult time frowning at those brightly-colored Tetris blocks.
The Tetris heat changing mug is a great gift for anyone who grew up playing the classic '80s computer game. It's likely your pals don't have the time to stay up all night playing Tetris like they did as children, so give them the gift of nostalgia.
The mug is also perfect for young children just discovering the wonders of Tetris. Watch their eyes light up every time you fill up their mug. Trust us; for them, it'll never get old.
But don't let our giving suggestions limit you. After all, no one in their right mind doesn't enjoy a rousing game of Tetris. Is there anything more satisfying than perfectly aligning those colorful blocks? We think not.
Image: Tumblr, Brother Brain
Just look at those blocks tumbling perfectly into place. Doesn't it bring you joy?
Do everyone you know a favor, and spread the joy with the Tetris heat changing mug. Your friends will thank you.
Image: Vat 19