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GoodDay™ + Nalgene

GoodDay™ + Nalgene

52 reviews

GoodDay™

20 servings / Pink Grapefruit

250 kr.

Nalgene x Good Habit Co. bottle

450 ml

200 kr.

Sale price  €48,95 EUR Regular price  €54,95 EUR
In stock. Delivery in 1-3 days.

All the electrolyte oomph of GoodDay™, now paired with a bottle that can keep up. This bundle makes sure you never settle for lukewarm sips or flimsy flasks again.

  • Sip smarter, train harder. GoodDay™’s hypotonic formula delivers 200 mg sodium, 100 mg potassium, and 16 % RI of magnesium per sachet – all tested by Informed‑Sport and backed by 28 studies. Perfect for workouts, long commutes, or that midday slump .
  • Built to last (literally for life). Nalgene’s Sustain 16 oz wide‑mouth bottle is made from Tritan Renew copolyester (50 % recycled content), BPA/BPS‑free, and guaranteed leak‑proof with straight‑shoulder threads.
  • Ice‑cube approved. The wide mouth lets you toss in cubes, powder, or a wedge of citrus—so your GoodDay™ stays chilled when you need it most.
  • Dishwasher safe & eco‑friendly. When you’re done, pop it in the top rack; the recycled plastic feels as sturdy as it looks, lowering landfill waste one refill at a time.

Whether you’re pounding pavement, desk‑bound, or exploring the outdoors, this duo keeps you topped up—inside and out. Add the GoodDay™ × Nalgene bundle to your routine and turn every sip into a recharge.

Nutritional information
Nutritional content pr. 100 g pr. 10,7 g
Energy 1271 kJ / 299 kcal 136 kJ / 32 kcal
Fat 0 g 0 g
of which saturated fat 0 g 0 g
Carbohydrate 75 g 8 g
of which sugars 75 g 8 g
Protein 0 g 0 g
Salt 4,7 g 0,5
Electrolytes
Potassium 935 mg (47%RI) 100 mg (5%RI)
Magnesium 561 mg (150%RI) 60 mg (16%RI)
Sodium 1869 mg 200 mg

Ingredients: Sucrose, dextrose, acidity regulators (sodium citrate, citric acid, potassium citrate), magnesium citrate, natural grapefruit flavouring, sweetener (steviol glycosides from the stevia plant)

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How to use

Mix the contents of 1 sachet with 400 ml of water. Stir or shake and consume within 24 hours. Store in a dry place at room temperature.

Drink around 200 ml at a time, to avoid a volume response leading to urination.

Consume before, during or after to support your hydration needs.

What are electrolytes?

Electrolytes are minerals your body uses to manage fluid balance and keep essential functions running—like muscle movement and nerve signaling. The key ones are sodium, potassium, magnesium, calcium, and chloride.

We lose electrolytes when we sweat—like during exercise, in the sauna, or on a hot summer day. We also lose them when we go to the bathroom—especially with diarrhea, after drinking alcohol (which is dehydrating), or just after a long day without enough water. And it’s primarily sodium that we lose.

That’s why our electrolyte powder is built around sodium, with added potassium and magnesium. Potassium and magnesium are lost in smaller amounts, but they still matter for muscle function and recovery. We’ve left out calcium, since Danish tap water is naturally high in it—most people get plenty from food and water already.

Sodium plays a special role. It helps your body absorb and distribute water through osmosis—aka the natural movement of water through cell membranes. When sodium is present in your gut, it pulls water into your bloodstream and out to your cells. Without enough sodium, much of the water you drink just passes straight through. That’s why sodium is essential for proper rehydration.

Who should drink electrolytes - and when?

The short version? Anyone who loses more fluid than usual—and starts feeling it.

Electrolytes make sense when you’re sweating or peeing more than normal. That can happen during exercise, in the sauna, when you’re sick, after drinking alcohol, or after a day where you simply forgot to hydrate. In those cases, you’re not just losing fluid—you’re also losing salts. And plain water isn’t always enough to fix that.

If you drink only water without any electrolytes, you risk diluting your body’s salt balance even more. That makes it harder for your body to retain fluid—and you can end up feeling flat, even if you’ve been drinking plenty.

But that doesn’t mean you always need electrolytes. If you feel good, have been sipping water regularly, and haven’t been sweating or peeing excessively—water is totally fine. It’s not about overdoing it. It’s about knowing when your body needs a little more than just H2O.

So when do electrolytes make sense? Here are the classics:

  • During and after long workouts – especially in the heat
  • After a night of drinking
  • When you’re sick and losing fluids
  • In hot climates or after a sauna
  • After a day where you’re clearly dehydrated

This isn’t about being extreme. It’s just about giving your body a little support, when it counts.

Why sugar?

We get it—sugar gets a bad rap. And if you’re fasting, keto, or sugar-free, it makes sense. But for the rest of us? Sugar is actually a smart little helper—especially if you’re active.

Sugar = carbohydrates. Carbs = energy. So if you’re already sipping carb mixes, downing gels, or munching on energy bars, you’re in the club. But here’s the thing: energy isn’t even why we added it.

We added a small amount of sugar (7.5 g per serving—30 kcal or about 2% in diluted mix) for one simple reason: it helps your body absorb water and electrolytes more efficiently. Think of it as a fast track through your gut.

Here’s how: in your small intestine, there are transporter proteins called SGLT1—short for sodium-glucose linked transporter. These guys activate when both sodium and glucose (sugar) are present. Once activated, they pull water and electrolytes across the gut lining and straight into your bloodstream. That means faster, more effective hydration.

So no, sugar isn’t the villain. At least not here. It’s part of the solution.

Backed by science

Based on 28 scientific studies examining optimal osmolality for hydration during exercise

Numerous studies say the same thing: Hypotonic electrolyte drinks best preserve hydration during exercise.

Used by the best

Good Athletes who excel in sport - and in life.

Jeppe Riisvig

Danish Champion, 3000m run

Learn more

Malene Degn

3x National Champion
15x World cup podiums

Learn more

Oliver Hartkopp

7x National Champion

Learn more

Customer Reviews

Based on 52 reviews
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M
Markus
Fantastisk kundeservice og godt produkt

Der var et problem med min ordre og kundeservice tog sig af det med det samme og svarede super hurtigt. Man føler dig virkelig tryg når man handler her. Derudover smager elektrolytterne også rigtig godt og de er gode til løb her om sommeren. Klar anbefaling herfra.

J
Julie Lund

GoodDay™ - Tasting pack

L
Lotte J.
Meget tilfreds

Bedste elektrolytter jeg indtil nu har prøvet . De smager dejligt og giver mig hurtig energi efter at have svedt alt ud af kroppen om natten .

B
Bént Warming
Ok

godt produkt

L
Lone Hansen
Starthjælp

En go hjælp til hovedet på en varm dag. Praktisk kun at bruge 4 el vand-> nemt at ryste sammen i en flaske. Nemt at opløse og forbliver opløst.