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Interpro Fitness
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Metal Insulated Gym Flask - Black
£19.99
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Free UK delivery over £60
Free 28-day returns
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Complete the look
Gym Gloves - Black
£10.99
£14.99
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Cap - Dark Grey
£12.99
£15.99
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Stay hydrated. Stay sharp. The Interpro 900 ml Matte Black Flask is designed for those who demand performance, durability, and style in every sip. This black metal insulated gym flask delivers the perfect combination of functionality and premium design, making it an essential companion for your training sessions, workdays, and active lifestyle.
Engineered from premium dual-layer stainless steel, this stainless steel water bottle for gym use delivers serious insulation to keep your drinks ice-cold for hours — whether you're in the gym, at work, or on the move. Built for reliability, it's the perfect insulated water bottle for gym goers who need long-lasting temperature control to stay refreshed throughout the day.
Featuring a leak-proof lid, movable mouthpiece, and turn-style handle, the Interpro flask offers total convenience and control. This insulated gym flask in black combines practical features with a sleek, modern appearance that fits seamlessly into your fitness routine.
Its matte black finish with a sleek silver Interpro logo delivers that premium edge — a perfect match for your fitness lifestyle. Crafted to perform. Built to last.
United Kingdom
Standard Delivery — £3.99
Estimated delivery: 2–3 working days
Free delivery on orders over £60.00
Next Day Delivery — £4.99
Order before 5pm for next working day delivery
Free next-day delivery on orders over £100.00
Exchange and returns accepted within 28 days. Items must be unworn and in original packaging. View full returns policy
Metal Insulated Gym Flask - Black
£19.99
Why Interpro
How our gym wear compares to the typical high street alternative.
| Feature | Interpro Fitness | Typical alternative |
|---|---|---|
| Heavyweight fabric | ||
| Free UK delivery over £60 | ||
| Returns window | 28 days | 14 days |
| Student discount | 15% off | |
| Buy more, save more | Up to 20% off |
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Frequently Asked Questions
Regular fit and true to size. If you prefer a relaxed, oversized look, order one size up.
Machine wash cold with like colours, do not tumble dry, and iron on low if needed. Avoid bleach so the colour and logo last.
UK standard delivery is 2 to 3 working days. Order before 5pm for next day delivery.
Yes, within 28 days, unworn and in the original packaging.
Still have a question about sizing or delivery? Contact our team
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Size Guide
Body measurements, not garment measurements. If you fall between two sizes we recommend sizing up. If your waist is one size smaller than your hips, go with the larger size.
| Size | Bust (cm) | Waist (cm) | Hip (cm) |
|---|---|---|---|
| XXS | 76.5-79.5 | 58.5-61.5 | 85.5-88.5 |
| XS | 79.5-85.5 | 61.5-67.5 | 88.5-94.5 |
| S | 85.5-91.5 | 67.5-73.5 | 94.5-100.5 |
| M | 91.5-97.5 | 73.5-79.5 | 100.5-106.5 |
| L | 97.5-103.5 | 79.5-85.5 | 106.5-112.5 |
| XL | 103.5-109.5 | 85.5-91.5 | 112.5-118.5 |
| XXL | 109.5-115.5 | 91.5-97.5 | 118.5-124.5 |
Prefer a tighter, second skin fit? Take the smaller size. Prefer room to move? Take the next size up.
1
Bust
Place the tape under your arms at the fullest part of your chest.
2
Waist
Measure the full circumference of your natural waistline, just above your hips. Do not pull the tape tight, leave a little give.
3
Hip
Measure the full circumference at the fullest point of your hips, including your seat.
4
UK size
XXS 2-4 • XS 6-8 • S 8-10 • M 10-12 • L 12-14 • XL 14-16 • XXL 18-20