The Assassin's Water Bottle

less than 1m read

·Nov 10, 2024

This water bottle allows you to carry two different liquids and dispense them from the same nozzle separately or together at your command. It's a collaboration between myself and Steve Mold that you can pre-order now.

It all started when Steve and I were talking about the physics behind the Assassin's teapot, and I said something like, "Wouldn't it be amazing if there was a water bottle that worked in the same way?" Then he probably said something like, "You have such good ideas, Michael, and you're so handsome." I think that's exactly how the project began.

Over the next few months, we designed a portable version of the Assassin's teapot: a double barrel water bottle with no moving parts that uses just surface tension and air pressure. We even designed mathematical koozies that can hide the secret or be removed to reveal and teach.

We call it the Assassin's water bottle. We are only going to make a limited number of these, so pre-order today. The future of drinking starts now. The future of poisoning people stops now. Do not use this for that.

The insanely scary "Tailless Whip Scorpion" - Smarter Every Day 77

How I built 6 Income Sources That Generate $59,750 Per Month

View All

Relative maxima and minima worked example

This is the Khan Academy exercise on relative maxima and minima, and they ask us to mark all the relative maximum points in the graph. Like always, pause this video and see if you can figure out which are the relative maximum points. Okay, now let’s work…

Introduction to the possessive | The Apostrophe | Punctuation | Khan Academy

Hello Garans, hello Paige, hi David in the driver’s seat. So Paige, today, uh, it is my understanding that we are going to talk about the possessive. That’s right. Um, what even is the possessive in English? What does that mean? When we say that, like, w…

Ask Sal Anything! Homeroom Wednesday, July 15

Hi everyone! Welcome to our homeroom live stream. Sal here from Khan Academy. Uh, before we get into, uh, our guest, who is me today, it’s just going to be an ask me anything type of thing. So actually start putting your questions on Facebook and YouTube…

These Tiny, Stunning Moths Are Only Found in One Place on Earth | National Geographic

A lot of people will think moth, and they’ll think dark gray fuzzy thing that they don’t want flying around their lights at night. These things don’t look like that at all, and in fact, most moths don’t. You say to anybody “microscopic moth,” they’re some…

Basic derivative rules: find the error | Derivative rules | AP Calculus AB | Khan Academy

So we have two examples here of someone trying to find the derivative of an expression. On the left-hand side, it says Avery tried to find the derivative of 7 - 5x using basic differentiation rules; here is her work. On the right-hand side, it says Hann…

Engineering with Origami

Engineers are turning to origami for inspiration for all types of applications, from medical devices to space applications, and even stopping bullets. But why is it that this ancient art of paper folding is so useful for modern engineering? Origami, liter…

The Assassin's Water Bottle

More Articles