

Intermediate Assassin
Schrödinger’s cat water bottle
Asteroids sleeve
Braids sleeve
Steve Mould mini poster
Unique P3M1 logo sleeve
$85
Buy nowIntermediate Assassin
Schrödinger’s cat water bottle
Asteroids sleeve
Braids sleeve
Steve Mould mini poste
rUnique P3M1 logo sleeve
$85
Buy now

Expert Assassin
Assassin’s water bottle
Schrödinger’s cat water bottle
Knight’s Tour sleeve
Asteroids sleeve
Braids sleeve
Unique P3M1 logo sleeveSteve Mould mini poster
Michael Stevens mini poster
$159
Buy nowBonus – Double signed double posters
Want something frame-worthy and brain-worthy?
We’ve got a limited number of A3 engineering posters signed by both Steve and Michael — available as an add-on while they last.
Two posters. Two signatures. One unique piece of art.
Steve Mould and Michael Stevens engineered the Assassin's Water Bottle to be the most curious hydration experience on the market. You won’t find it anywhere else.
It’s exclusive. It’s confusing. It’s borderline suspicious.
SIGNED LIFE-SIZED ENGINEERING PRINTS

$65 each OR $120 for both
Both engineering posters together create the Michael<>Steve chimera with a signature from Steve and Michael.
BEHIND THE SLEEVES
BRAIDS
A mathematical knot is a closed curve in three-dimensional space - essentially, a curvy shape where the ends connect. Alexander’s Theorem proved that every knot could also be represented as a braid - a ring of intertwined threads that happens to be a perfect thing to decorate a cylinder with. Features a spectrum of eight of our favorite Alexander braids.
KNIGHT'S TOUR
If you place a knight on an empty chess board, it’s possible to visit every square on the board exactly once and end up back where you started using the knight’s unique movement pattern. That’s called a knight's tour, and there are millions of different knight’s tours for a standard 8x8 chessboard. But it’s impossible to create one for a board with an odd number of squares - unless that board is on a cylinder! Say hello to your 9 x 13 knight’s tour.
KNIGHT'S TOUR
If you place a knight on an empty chess board, it’s possible to visit every square on the board exactly once and end up back where you started using the knight’s unique movement pattern. That’s called a knight's tour, and there are millions of different knight’s tours for a standard 8x8 chessboard. But it’s impossible to create one for a board with an odd number of squares - unless that board is on a cylinder! Say hello to your 9 x 13 knight’s tour.
ASTEROIDS
In the classic arcade game Asteroids, when you fly off the left edge of the screen, you reappear on the right. In other words, the Asteroids universe is topologically equivalent to a cylinder. So we put it on one.
P3M1 WALLPAPER
There are only 17 different wallpapers. Which is to say,there are only 17 planar symmetry groups. Steve's favoriteis the p3m1 group.
P3M1 WALLPAPER
There are only 17 different wallpapers. Which is to say,there are only 17 planar symmetry groups. Steve's favoriteis the p3m1 group.
HISTORY OF THE ASSASSIN'S TEAPOT


“The assassin’s teapot just wasn’t portable enough for me. I need to be able to secretly choose between two liquids ON THE GO!”
Steve Mould
co-creator
“I never considered poisoning anyone until now. Just kidding!!… Or am I?”
Michael Stevens
co-creator
FAQ


Introducing the Assassin's Water Bottle: A world-premier collaboration by Steve Mould and Michael Stevens. A modern take on the legendary assassin’s teapot, this dual-chambered bottle holds two separate liquids, but allows you to pour one at a time. The secret lies in covering one of two air holes with your thumb to deliver the mystery liquid to your unsuspecting guest.
It took two years to vault over some of the surprisingly complex engineering hurdles that make this assassin’s bottle work. Amaze your friends or just use it to carry two different drinks in one marvelous container.

Beginner Assassin
- Schrödinger’s cat water bottle
- Unique P3M1 logo sleeve
- Schrödinger’s cat water bottle
- Unique P3M1 logo sleeve
$65
BUY NOW
Intermediate Assassin
- Schrödinger’s cat water bottle
- Asteroids sleeve
- Braids sleeve
- Steve Mould mini poster
- Unique P3M1 logo sleeve
$85
BUY NOW

Expert Assassin
- Assassin’s water bottle
- Schrödinger’s cat water bottle
- Knight’s Tour sleeve
- Asteroids sleeve
- Braids sleeve
- Unique P3M1 logo sleeve
- Steve Mould mini poster
- Michael Stevens mini poster
$159
BUY NOW
Beginner Assassin
- Schrödinger’s cat water bottle
- Unique P3M1 logo sleeve
Schrodinger’s cat water bottle
Unique P3M1 logo sleeve
$65
BUY NOW
INTERMEDIATE ASSASSIN
Schrodinger’s cat water bottle
Asteroids sleeve
Braids sleeve
P3M1 logo sleeve
Steve Mould mini poster
$85
BUY NOWIntermediate Assassin
- Asteroids sleeve
- Braids sleeve
- Steve Mould mini poster
- Schrödinger’s cat water bottle
- Unique P3M1 logo sleeve
$85
PRE-ORDER

Expert Assassin
Assassin’s water bottle
Schrodinger’s cat water bottle
Knight’s Tour sleeve
Asteroids sleeve
Braids sleeve
P3M1 logo sleeve
Steve Mould mini poster
Michael Stevens mini poster
$159
BUY NOWSIGNED LIFE-SIZED ENGINEERING PRINTS

Both engineering posters together create the Michael<>Steve chimera with a signature from Steve and Michael.
$65 each OR $120 for both
BUY NOWSIGNED LIFE-SIZED ENGINEERING PRINTS

Both engineering posters together create the Michael<>Steve chimera with a signature from Steve and Michael.
$65 each OR $120 for both
BUY NOW

BEHIND THE SLEEVES
BRAIDS
A mathematical knot is a closed curve in three-dimensional space - essentially, a curvy shape where the ends connect. Alexander’s Theorem proved that every knot could also be represented as a braid - a ring of intertwined threads that happens to be a perfect thing to decorate a cylinder with. Features a spectrum of eight of our favorite Alexander braids.
KNIGHT'S TOUR
If you place a knight on an empty chess board, it’s possible to visit every square on the board exactly once and end up back where you started using the knight’s unique movement pattern. That’s called a knight's tour, and there are millions of different knight’s tours for a standard 8x8 chessboard. But it’s impossible to create one for a board with an odd number of squares - unless that board is on a cylinder! Say hello to your 9 x 13 knight’s tour.
KNIGHT'S TOUR
If you place a knight on an empty chess board, it’s possible to visit every square on the board exactly once and end up back where you started using the knight’s unique movement pattern. That’s called a knight's tour, and there are millions of different knight’s tours for a standard 8x8 chessboard. But it’s impossible to create one for a board with an odd number of squares - unless that board is on a cylinder! Say hello to your 9 x 13 knight’s tour.
ASTEROIDS
In the classic arcade game Asteroids, when you fly off the left edge of the screen, you reappear on the right. In other words, the Asteroids universe is topologically equivalent to a cylinder. So we put it on one.
P3M1 WALLPAPER
There are only 17 different wallpapers. Which is to say,there are only 17 planar symmetry groups. Steve's favoriteis the p3m1 group.
P3M1 WALLPAPER
There are only 17 different wallpapers. Which is to say, there are only 17 planar symmetry groups. My favorite is called the p3m1 group, which is almost what is shown on this logo sleeve.
HISTORY OF THE ASSASSIN'S TEAPOT

“The assassin’s teapot just wasn’t portable enough for me. I need to be able to secretly choose between two liquids ON THE GO!”
Steve Mould
co-creator

“I never considered poisoning anyone until now. Just kidding!! … Or am I?”
Michael Stevens
co-creator
FAQ
Made in China in homage to the original Ming Dynasty assassins and their teapots. Patent Pending.
For any additional questions, please submit a request.