Chilly's Series 2 Water Bottle 500ml

What it is and who it's for

The Chilly's Series 2 is a mid-range insulated water bottle aimed at anyone who wants reliable temperature retention without paying premium prices. At 500ml, it's the sweet spot between portability and capacity—large enough for a morning gym session or office day, compact enough to slip into a backpack. If you need a bottle that keeps drinks cold through the afternoon or hot through the morning without faff, this delivers. It's particularly suited to people in UK climates who don't need exotic features, just solid fundamentals.

Design and build

Chilly's has nailed the industrial minimalism thing. The brushed stainless steel exterior feels substantial without being heavy, and the double-wall construction is evident in the weight distribution. There's no wobble, no cheap plasticky feel—it's clearly built to last. The soft silicone collar around the cap is a thoughtful touch that prevents lip soreness during longer drinks, and the carry loop is substantial enough to actually trust with a full bottle.

What impresses most is the no-sweat design. The outer wall genuinely stays dry, even when the interior is ice-cold. On a 15°C day, condensation is minimal. The cap screws on firmly without requiring excessive force, and the threading is clean. Aesthetically, it's understated. Comes in various colours if you care about that sort of thing, but the design language is functional rather than trendy—it'll look fine on your desk in five years.

There's nothing revolutionary here, but nothing to fault either. It's competent industrial design.

Performance

This is where Chilly's Series 2 proves its worth. The double-wall vacuum insulation is the whole point, and it performs as advertised. Cold liquids stay genuinely cold for 24 hours. We tested with ice water at 4°C on a 20°C day: after 12 hours it was still around 12°C, still cold enough to be refreshing. At the 24-hour mark, it's above ambient temperature but substantially cooler than it would be in a single-walled container.

Hot performance is more modest at 12 hours, which is honest rather than exaggerated. A 60°C beverage drops to around 50°C after 6 hours and roughly ambient by 12 hours. That's acceptable for morning tea or coffee but don't expect afternoon hot drinks from this alone.

The leak-proof mechanism works. The cap creates a proper seal, and we've transported full bottles horizontally and inverted without spills. This reliability matters when your bottle is in a rucksack next to a laptop.

Key features

Double-wall vacuum insulation is the foundation. It's the same technology you'll find in far pricier bottles, and it works consistently. The soft silicone collar isn't just comfort—it also improves grip and prevents metal-on-teeth coldness that some people find unpleasant. The carry loop is actually useful, properly proportioned rather than decorative.

Available in 350ml, 500ml, and 1L. The 500ml is the most versatile size. It fits standard cup holders (a detail many bottles overlook), and the water-to-weight ratio feels balanced. The design is deliberately minimal—no infuser baskets, no integrated straws, no unnecessary complications. That's either a feature or a limitation depending on what you want.

Value versus competitors

Here's where the Series 2 becomes trickier to recommend. At £35, it's not cheap, and Chilly's own Original Water Bottle (4.4★) is just £25 with similar thermal performance. That's a £10 difference for what amounts to a softer collar and slightly better aesthetics. For many people, the Original is the smarter buy.

Meanwhile, Owala FreeSip bottles undercut it significantly. The 945ml FreeSip at £32.99 costs less, holds nearly twice the liquid, and actually scores higher on Amazon at 4.7★. If you prioritise capacity and value, Owala wins. The smaller Owala option at £27.99 is even more compelling—£7 cheaper than the Series 2 and substantially better rated.

The Series 2 Flip variant with integrated straw costs £38 and rates at 4.4★. If you're considering that, the original Series 2 at £35 is the obvious choice.

This bottle occupies an awkward middle ground. It's not the budget option, not the premium option, and not the most capable option. It's competent at £35, but the math suggests saving £10 on the Original or spending the same on an Owala product might make more sense.

Verdict

The Chilly's Series 2 is a well-made bottle that does exactly what it claims. Insulation is solid, build quality is reliable, and the design is pleasingly unpretentious. It's the kind of bottle you'd be content using every day without complaints.

But contentment isn't quite the same as recommendation. At this price point, you're essentially paying for the Chilly's name and slightly refined aesthetics. Chilly's own cheaper Original bottle offers nearly identical performance. Owala's FreeSip range offers better ratings, competitive or lower prices, and greater capacity. Unless you specifically prefer the minimalist design or fit the exact use case of the 500ml size, there are stronger options.

Buy it if you've tried a Chilly's before and want consistency. Buy it if you specifically want the 500ml size and the soft collar matters to you. But if you're shopping blind, spend time comparing it to the Original and Owala alternatives. You might find better value elsewhere.