sweatsciences
The Jar Kit · first run of 20 · ships in the US

Your formula, made physical.

The calculator gives you your exact number. The kit makes it a thing on your shelf: a blending jar, a calibrated scoop, and your personal recipe card — printed waterproof from your saved formula. Mix a month once. Scoop it daily. Dosed to one body: yours.

§ In the box

Three objects. One of them is yours alone.

The jar ~30 sessions The scoop calibrated to your blend YOUR FORMULA 1,410 mg Na Your recipe card waterproof · one of a kind
01 · The jar

One month of you

A wide-mouth blending jar sized for ~30 sessions of your blend — pink salt, potassium chloride, magnesium — at your ratio, locked in once so no session needs a scale.

See your jar recipe →
02 · The scoop

Calibrated to your blend

One level scoop = one session. The card tells you your scoop size; the ratio inside the jar makes it accurate without weighing. The math is the product.

Why ratios beat tabs →
03 · The card

Your recipe, waterproof

Printed from your saved formula: your Na · K · Mg, your jar blend, your per-session scoop, your reorder list. Gym-bag-proof. No two cards are the same.

Preview a card →
§ What's deliberately NOT in the box

We ship the vessel and the math — never the powder.

Your minerals arrive sealed from the brands you already trust — Skratch, Redmond, NOW — via the links on your card, about $1.50–2 a session at bulk. Nothing repackaged, nothing scooped by strangers, nothing with our label where a supplement label should be. That's not a limitation; it's the design: the personalization lives in the math and the vessel, and the ingredients stay exactly as their manufacturers sealed them.

§ Get it

Kit + your card. $34.

$34
one-time · shipped in the US · first run of 20

At checkout, paste your recipe link (run the calculator → “Copy share link”) — that's what your card is printed from. No link handy? We'll email you for it. Prefer an invoice? Order by email →

Order the Jar Kit

We confirm and invoice within 1 business day. Nothing is charged on this form.

§ Why this and not another tub

Because your sweat isn't the average.

The tenfold problem

200–2,000 mg/L

Sweat sodium varies tenfold between people. Every pre-mixed tub is someone else's average. Your jar is blended to your concentration — that's the whole point.

The primary sources →
The honest math

~$2 vs $6.50 a session

Your blend at bulk beats pre-mixed tabs on cost AND completeness — potassium and magnesium included, which most tabs skip.

Check your current drink →
Seen it at a studio?

The Sweat Station

The scale-and-QR station in hot yoga studios runs on the same engine. Studios host it; members get their number; the kit makes it a habit.

For studios →