Hydro Flask’s Viral ‘Micro’ Bottles Now Come in Two More Sizes & Feature a Design Choice That Fans Have Been Begging For
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If you thought Hydro Flask’s tiny-but-mighty Micro Hydro bottles couldn’t get any better, think again. After going viral for their pocket-perfect size and collectible colors, Hydro Flask just gave fans exactly what they’ve been asking for: two new sizes, a removable clip strap, and fresh spring colors — all while keeping the same cult-favorite compact design.
Originally launched as a 200 mL mini, the Micro Hydro quickly became one of Hydro Flask’s fastest-selling products, selling out multiple times and taking over social feeds thanks to its unexpected versatility. People were using it for everything from espresso shots and wine pours to hot water for ramen and tea, turning the bottle into more than just drinkware — it became a lifestyle accessory.
And now, the brand has officially expanded the line with two new sizes: 300 mL (10 oz) and 400 mL (13.5 oz), giving fans a little more hydration without sacrificing the small, grab-and-go appeal that made the original so popular. With Valentine’s Day and Galentine’s Day right around the corner, these would make excellent affordable gifts.
Micro Hydro 300 mL in Popstar Pink
Enjoy 10 oz of tiny sips in a mini Hydro Flask in a bright spring hue — still small, just bigger. A larger mini Hydro Flask, this Micro Hydro delivers 10 oz / 300 mL of hot and cold in a mini stainless steel insulated bottle. Just the essentials with a nod to minimalistic style. The removable FlexClip bottle strap lets you easily clip it on a bag or waist. Pop it in your pocket, fit in a lunch box, the tiny size sits easily in the palm of your hand. The Micro Hydro boasts Hydro Flask’s iconic insulation, leakproof technology and lifetime warranty. Cute, useful and destined for beloved status.
The biggest update, though, is the new removable FlexClip strap — a feature Hydro Flask fans have been asking for since the Micro first went viral. The clip strap makes it easy to attach the bottle to totes, backpacks, belt loops, or bags, turning it into a hands-free essential for commuting, travel days, campus life, festivals, and quick coffee runs. It’s a small change that makes a big difference — and one that proves the brand was really listening.
Despite the size upgrade, all Micro Hydro bottles still feature the same durable stainless-steel construction and TempShield double-wall vacuum insulation, keeping drinks hot or cold for up to seven hours. They’re leakproof, built to last, and designed for everyday use — whether you’re sipping, sharing, or refilling on the go. Hydro Flask also introduced Micro Boots for each size, adding extra protection and letting fans mix and match colors for even more personalization.
Micro Hydro 400 mL in Mermaid Green
A larger mini Hydro Flask, this Micro Hydro delivers 13.5 oz / 400 mL of hot and cold in a mini Hydro Flask. Just the essentials with a nod to minimalistic style. The new removable FlexClip bottle strap lets you easily slip it on a bag or waist. Pop it in your pocket, fit in a lunch box, the tiny size sits easily in the palm of your hand. The Micro Hydro boasts Hydro Flask’s iconic insulation, leakproof technology and lifetime warranty. Cute, useful and destined for beloved status.
Speaking of color, the Micro Hydro expansion includes a wave of fresh spring shades, including Popstar Pink, Cloud Pink, Mermaid Green, Capri Blue, and Harbor Blue. The original 200 mL size is still available in more than a dozen additional core and limited-edition colors, and fans can continue customizing combinations through Hydro Flask’s MyHydro program — which means the color-collecting obsession is very much still alive.
Micro Hydro 200 mL in Glimmer Cream (Limited Edition)
Get 6.7 oz of tiny sips in this gorgeous mini Hydro Flask. The mini size of the Micro Hydro tiny bottle fits anywhere and delivers everything you need and nothing you don’t. Ramen on the go? Hot water’s in tow. Bring the wine, it fits a glass perfectly. Cold sips to wet your whistle.
The new Micro Hydro bottles are available now on HydroFlask.com, with the 300 mL priced at $27.95 and the 400 mL at $32.95. For anyone who loved the original mini but wanted just a little more capacity — or a better way to carry it — this update feels like a win across the board. Still tiny, just bigger, and now easier to take everywhere, Hydro Flask’s Micro Hydro proves that sometimes the smallest products inspire the biggest fandoms.