seik girl boss 500ml thermos in a practical workspace setting with a laptop

Girl Boss Stainless Steel Water Bottle 500ML

Name: Girl Boss Stainless Steel Water Bottle 500ML
Brand: SEIK
SKU: 4744716018589
Price: 23.87 GBP
Availability: InStock

SEIK

£23.87 GBP

Taxes included. Shipping calculated at checkout.

Hydration Worth Showing Off

Yes, it's a water bottle, and yes, it's absurdly stylish. The kind of bottle that says you’ve got it together (or at least enough to sip smartly during meetings and Pilates sessions you mostly attend for the leggings). With a 500ML capacity and a delightfully sleek design, it makes you feel rather on top of life... or like you might be, any moment now.

Why Choose Our Girl Boss Stainless Steel Water Bottle?

Temperature Control: Keeps Drinks Just Right

Thanks to clever double-wall insulation, your tea stays hot for 6 hours and your water refreshingly cold for 12. Like a trusty sidekick who understands your beverage preferences better than your flatmate.

Leakproof Lid: Save the Handbag Drama

You deserve hydration without the horror of a soaked tote. The vacuum-sealed cap keeps liberties taken with your bag contents to an absolute minimum.

Utterly Fetching and Gloriously Reusable

Looks gorgeous on your desk and scores eco-points without shouting about it. Because doing your bit for the planet shouldn’t clash with your outfit.

Product Details:

Capacity: 500ML
Temperature Retention: 12H Cold / 6H Hot
BPA Free
Eco Friendly Design
Leakproof and Durable
Designed in Estonia
Suitable for hot and cold liquids (best avoid fizzy ones)
Care Instructions: Hand wash with a brush and baking soda to keep things fresh
Avoid placing in oven, freezer or microwave

Pop it in your basket now, before your calendar fills with excuses

THE RATHER IMPORTANT BITS

This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.

SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.

Some are brilliant at international shipping, others prefer to keep things closer to home.

At checkout, you'll see exactly where this particular brand can send your goodies.

We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!

RETURNS

You have 14 days to return items.

Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!

🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.

Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!

We're frightfully modern and accept all the usual suspects:

Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay

SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!

All prices in lovely British pounds £ GBP, though international chaps will see converted prices.

Any payment pickle? We're here to help sort things out! Contact us

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Sostter began, as all good ideas do, with a lively conversation and a shared sense of frustration. Why had the world of independent design become so serious, so samey, so… beige? Where was the spark, the imagination, the sheer joy of discovering something that made you stop and stare?

We dreamt of a marketplace that celebrated difference — where curious minds could explore a world of independent brands, design-led makers, and thoughtful artisans. A space that felt exciting, human, and beautifully imperfect. Today, Sostter brings together remarkable people and their creations — from London to Lausanne, Brooklyn to Berlin — uniting makers and discoverers through craftsmanship, creativity, and conscience.

Every object tells a story, and every purchase supports an independent brand doing things differently. Explore our British makers, discover sustainable brands, browse women-led businesses, find the perfect gift for her, or simply wander through our new arrivals and see what finds you.

This is just the beginning. But enough about us — read all about us, or step inside and see what catches your imagination.

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Discover our world of independent brands, conscious design, and purposeful creativity — all in one place.

Sostter is more than a marketplace. We're here to inspire a more thoughtful way to shop — one that celebrates the makers, the dreamers, and the independent brands doing things properly. Every brand on Sostter has been individually vetted for its originality, quality, and values. From sustainable fashion and ethical homeware to handmade jewellery and design-led gifts — all brought together in one considered space. Browse by location, by purpose, or simply wander and see what finds you. Want to sell with us? We'd love to hear from you.