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At first glance, this looks like a terrible idea.  Potassium Ferricyanide can be turned into the deadly toxin Potassium Cyanide.

But this pair is for something far more innocuous - the reaction with Ferric Ammonium Citrate makes Cyanotype, also known as Blueprint, which is part of a photographic process that predates silver-based photography.  It can be used to photocopy with a strong light source, or for Sun Printing.

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Duke Cannon.  Because Dash Riprock and Bif Hardchest were already taken.

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You’ve just bought an overpriced novelty food gadget, destined to be used once or twice and then become another piece of dust-covered clutter.

Just how many cookbooks on the subject do you really need, tho?

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The top of the list of Things That Don’t Need Man-Branding:  Hardware.

Ironically, I had to search a long time to find any Frequently Bought Together item from Gentlemen’s Hardware - it’s an entire Man-Brand of inexpensive crap rebranded in a faux-hipster manly imprint with 400% markup.

For example, that hammer is a $5 stocking stuffer you can get at any department store in December.  There are numerous versions on Amazon, from $11 for the generic version, or you can save $5 if you don’t mind a floral print.

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I guess the sort of customer that finds “Poo-pouri” and “Master Crapsman” funny enough to overspend on manly toilet spray is the exact right audience for mall ninja knives poorly disguised as keys and credit cards.

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Amazon is happy to provide you with one-click kits to extract THC from cannabis using the finest explosive solvents.

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Calcium carbide is dangerous enough by itself; when added to water, it produces acetylene gas, which is highly explosive.  The items it is frequently bought with indicate why people are interested - it is a much more powerful gas to use in your potato cannon.

At least Jimmy Kimmel didn’t tell kids exactly how to blow up pumpkins with it.

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Yet another popular duo purchased by high school chemistry teachers and amateur arsonists.  Potassium Permanganate and Glycerin react to produce a pretty flame after a delay.  Note that most demonstration manuals suggest using no more than 3g of KMnO4; here’s 400x as much as you need.

The combination is apparently so popular that even the Wilton Glycerin product page shows another KMn04, while the description of the Glycerin suggests using it for decorative food projects like cake icing.

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Let’s check in on our old friend, the Norpro Glass Baster, the handy kitchen implement best known for its role in making and consuming DMT.  What are people buying it with these days?  Oh.

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You could make thermite, magnetic silly putty, or pigments from this kit of helpfully-prepared thermite ingredients.

Frequently bought with a fuse, not a paintbrush or plastic eggs.

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Customers who bought gunpowder-making ingredients also bought several other bomb-making components.

Amazon knows this, doesn’t really care.

(I know black powder is generally legal in small quantities.  But if your order contains enough fertilizer to blow up a city block, maybe somebody should check on your mental state...)

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So this one isn’t actually funny and/or depressing.  Given recent articles on buying bomb-making material on Amazon, you might assume the worst.

But no, camphor, ammonium chloride and saltpeter mixed together in distilled water can make an old-fashioned weather-forecasting device called Storm Glass (Wikipedia).

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What does having knee pain have to do with wanting a fairly crappy lighter?

Oh, wait, “magnetic pain relief”.  They’re both aimed at the same gullible audience.

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I’m gonna call this combo the “30-35 year old mother of a toddler starter pack.”

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So you could spend $20 on some silicone boob cups, or for $17 you could go DIY with 30 yards of tan-colored Premium Grade Gaffer Tape.

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The blindfold is a sleeping mask that is comfortable and good at blocking light.

The handcuffs are produced by Tacticool-manufacturer VIPERTEK which typically caters to mall ninjas and rent-a-cops and are touted as double-locking black steel and compatible with Smith & Wesson keys.

The whip isn’t even labelled as a riding crop, but by a term only true equestrians would know!

You try to produce a quality product at a low price, categorize it appropriately and market it with a straight face, and those resourceful BDSM types out you anyway.

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Why do people buying high concentrations of Hydrogen Peroxide also buy Potassium Iodide?  A silly (but crowd-pleasing) chemistry demonstration called “Elephant’s Toothpaste” which produces jets of cylindrical dish soap foam, along with spraying caustic, skin-bleaching chemicals around the immediate area.