Pre-order now – Ships Q2 2025
A dual-chamber bottle that lets you pretend to poison your friends — but like, in a deeply educational way. One side is the Assassin’s Water Bottle, complete with real LD50 measurements. The other is the Schrödinger’s Cat Bottle, where whether it's safe to drink depends entirely on whether anyone is watching.
This is a bottle. This is a puzzle. This is a science trick that walks the line between weirdly dark and hilarious.
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
“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