Caffeine + Brain Heat Change Mega Mug

$ 22.95
The alarm goes off and you've only been asleep for three hours. You get out of bed and stumble toward the coffee pot for your dark roasted elixir. As you inhale the bold aroma, the fog in your brain begins to dissipate. You add a little cream – or maybe don't even bother – and start sipping. By the time you can see the bottom of your mug and you're reaching for a refill, the day has come into focus. You're ready for anything.

But what actually happened in your brain?

This mug has the answer for you! 

When the mug is cold, you'll see how your brain looks before the infusion of caffeine. As you fill it up and the mug warms, the design changes to show your wide-awake, post-caffeine brain.

Here's the short story on the science of what's happening:

As adenosine naturally builds up in the brain, it binds to the A1 receptor and keeps dopamine locked up. Caffeine works its magic by stealing adenosine's spot on the A1 receptor, which releases dopamine into the synaptic gap. This rush of dopamine imparts the happy, alert feeling you love about your magical brew.
Volume 20 oz
Care Hand wash, Do not microwave
Material Ceramic


When your order arrives, open it up and take a look. If anything isn't as expected, got damaged in transit, or doesn't fit properly, let us know and we'll make it right.

Flat Rate $9.95
Orders $75+ ship for free
Expedited service available


Shipping is available to most countries. See details at checkout.

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Customer Reviews
5.0 Based on 7 Reviews
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Nicole M.
United States United States
Excellent idea for a present

I was expecting shipping to be delayed due to the pandemic, but it shipped on time. My friend loved the mug! Great gift idea!

Nanette P.
United States United States

Very large mug. Was pleasantly surprised

A Cognitive Surplus Customer
Adrian H.
United States United States
A real good cup with just the right size

I love my new mug. Its size is just right to satisfy my caffiene need early in the morning and the illustration is wonderfully whimsical. It has become my favorite cup.

Paris A.

Great gift, fast shipping. My boyfriend really loved it! Very cool heat changing effect.

Emily V.

These small notebooks will make a great stocking stuffer- they're not flimsy even for their size and should hold up pretty well! The art on each one is very detailed and they look great.


I ordered this mug as a Christmas present for my boyfriend who's currently in his first year of a neuroscience phD program, and I already know he's going to love it! It loks exactly as picture, is MASSIVE, and seems very sturdy. It originally shipped quickly, but the handle was broken during transit. I contacted Cognitive Surplus about this and their customer service was wonderful. They shipped me a brand new mug, which arrived even faster than the first, and is in perfect condition. I highly reccomend this mug and this company! Will be hopefully ordering again in the future.


I bought this for myself. I got it because of the amazing design and that it has a unique feature: that it changes its appearance when hot water is added. It my favorite mug! I’m so happy with it.

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