--- product_id: 322529497 title: "GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz." brand: "gsi outdoors" price: "€ 85.25" currency: EUR in_stock: true reviews_count: 5 category: "Gsi Outdoors" url: https://www.desertcart.at/products/322529497-gsi-outdoors-boulder-flask-graphite-10-fl-oz store_origin: AT region: Austria --- # Hinged silicone grip cap 10 fl. oz. wide-mouth capacity Shatter-resistant copolyester GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. **Brand:** gsi outdoors **Price:** € 85.25 **Availability:** ✅ In Stock ## Summary > 🥾 Sip Boldly, Adventure Freely — The Flask That Keeps Up ## Quick Answers - **What is this?** GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. by gsi outdoors - **How much does it cost?** € 85.25 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/322529497-gsi-outdoors-boulder-flask-graphite-10-fl-oz) ## Best For - gsi outdoors enthusiasts ## Why This Product - Trusted gsi outdoors brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Generous:** 10 fl. oz. capacity fits comfortably in your pack or jacket pocket, balancing portability with enough refreshment. - • **Effortless Fill & Pour:** Wide mouth design lets you fill, pour, and sip without spills or hassle—perfect for on-the-go hydration. - • **Never Lose Your Lid Again:** Hinged silicone cap stays attached and easy to open, even with cold or gloved hands. - • **Built to Brave the Outdoors:** Shatter-resistant copolyester body with a grippy silicone bumper means this flask is your rugged adventure sidekick. - • **Precision Hydration Control:** Molded graduation marks let you track your beverage levels at a glance—no more guessing. ## Overview The GSI Outdoors Boulder Flask is a durable, 10 fl. oz. copolyester flask designed for active lifestyles. Featuring a shatter-resistant body, wide mouth for easy filling and pouring, and a hinged silicone grip cap that won’t get lost, it’s built to withstand rugged outdoor use. Molded graduation marks provide quick volume checks, while its compact size ensures it fits effortlessly in your gear. BPA-free and designed for worry-free sipping, this flask is the perfect companion for hiking, camping, concerts, or daily commutes. ## Description Celebrate your outdoor adventures or your next concert with the GSI Outdoors Boulder Flask! Its copolyester resin construction is crafted to withstand any bumps, drops and dings along the way. The wide mouth design makes it easy for both filling up or pouring directly into a cup–plus an attached hinged silicone cap ensures a good grip even in cold temperatures. This BPA-free flask also features graduation marks molded on its surface, so you can easily check how much beverage remains inside without having to guess. Whatever your “poison,” you’ll enjoy worry-free trail sippin’ without any foul taste from the flask material. Don’t leave camp without this handy companion by your side! Review: Resistente - Bastante resistente, compacta y ligera. No tiene fugas y se puede guardar hasta en una sudadera por el tamaño. Review: Stylish and Reliable - The GSI Outdoors Boulder Flask Thermos is a fantastic companion for outdoor enthusiasts and travelers looking to enjoy their favorite beverages on the go. This flask has quickly become my go-to choice for its style, reliability, and impressive thermal performance. First and foremost, the design of the Boulder Flask is sleek and eye-catching. The durable stainless steel construction not only looks great but also ensures long-lasting durability. The textured grip adds a touch of elegance and provides a secure hold, preventing any accidental slips. When it comes to thermal performance, this flask truly shines. The double-wall vacuum insulation keeps my beverages hot or cold for extended periods. Whether I'm sipping on a steaming cup of coffee during a chilly hike or enjoying a refreshing cold drink on a hot summer day, the Boulder Flask consistently delivers on its promise. Another feature that sets this flask apart is its convenient size. With a generous 10-ounce capacity, it strikes the perfect balance between portability and capacity. It easily fits into my backpack or bag without taking up too much space, making it ideal for outdoor adventures or daily commutes. The leak-proof cap ensures worry-free transportation, preventing any spills or leaks. I appreciate the thoughtful design that allows for easy pouring and drinking, thanks to the well-designed spout and integrated cap. ## Features - Shatter-resistant, copolyester resin body and grippy, silicone bumper mean this flask can go anywhere. - Wide mouth makes for easy filling, pouring and drinking. - Hinged top with silicone grip is easy to open and impossible to misplace. - Convenient molded graduation marks. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07W6B1Z5V | | Best Sellers Rank | #175,219 in Sporting Goods ( See Top 100 in Sporting Goods ) #71 in Camping & Hiking Hydration Flasks | | Brand | GSI Outdoors | | Brand Name | GSI Outdoors | | Color | Graphite | | Colour | Graphite | | Customer Reviews | 4.6 out of 5 stars 295 Reviews | | Finish Types | Graphite | | Finish type | Graphite | | Item Dimensions D x W x H | 2.8D x 9.4W x 16.5H centimeters | | Manufacturer | GSI Outdoors | | Manufacturer Part Number | 79346 | | Material | Copolyester, Silicone | | Material Type | Copolyester, Silicone | | Model Name | Boulder 10 Flask | | Model Number | 79346 | | Product dimensions | 2.8D x 9.4W x 16.5H centimeters | | Shape | Rectangular | | Unit Count | 1.0 Count | | Volume | 10 Fluid Ounces | ## Product Details - **Brand:** GSI Outdoors - **Colour:** Graphite - **Finish type:** Graphite - **Material:** Copolyester, Silicone - **Product dimensions:** 2.8D x 9.4W x 16.5H centimeters ## Images ![GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. - Image 1](https://m.media-amazon.com/images/I/61rqHnxqh4L.jpg) ![GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. - Image 2](https://m.media-amazon.com/images/I/71Ql5AVd74L.jpg) ![GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. - Image 3](https://m.media-amazon.com/images/I/71it1oM412L.jpg) ![GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. - Image 4](https://m.media-amazon.com/images/I/71VIhmfMsWL.jpg) ![GSI Outdoors, Boulder Flask, Graphite, 10 fl. oz. - Image 5](https://m.media-amazon.com/images/I/61Fg9jDFX7L.jpg) ## Questions & Answers **Q: Is this flask made in China?** A: It just says imported. I dont see where it says from. **Q: Is this made of plastic? What kind of plastic? What is the recycle/plastic number on the bottom?** A: I'm not sure what kind of plastic but its really durable , i haven't had any issue **Q: Does this have any metal? Will this set off a metal detector?** A: No metal, **Q: Is it boa free?** A: Yes, it is. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Resistente *by F***S on 20 September 2024* Bastante resistente, compacta y ligera. No tiene fugas y se puede guardar hasta en una sudadera por el tamaño. ### ⭐⭐⭐⭐⭐ Stylish and Reliable *by J***9 on 13 June 2023* The GSI Outdoors Boulder Flask Thermos is a fantastic companion for outdoor enthusiasts and travelers looking to enjoy their favorite beverages on the go. This flask has quickly become my go-to choice for its style, reliability, and impressive thermal performance. First and foremost, the design of the Boulder Flask is sleek and eye-catching. The durable stainless steel construction not only looks great but also ensures long-lasting durability. The textured grip adds a touch of elegance and provides a secure hold, preventing any accidental slips. When it comes to thermal performance, this flask truly shines. The double-wall vacuum insulation keeps my beverages hot or cold for extended periods. Whether I'm sipping on a steaming cup of coffee during a chilly hike or enjoying a refreshing cold drink on a hot summer day, the Boulder Flask consistently delivers on its promise. Another feature that sets this flask apart is its convenient size. With a generous 10-ounce capacity, it strikes the perfect balance between portability and capacity. It easily fits into my backpack or bag without taking up too much space, making it ideal for outdoor adventures or daily commutes. The leak-proof cap ensures worry-free transportation, preventing any spills or leaks. I appreciate the thoughtful design that allows for easy pouring and drinking, thanks to the well-designed spout and integrated cap. ### ⭐⭐⭐⭐⭐ Perfect! *by A***B on 22 April 2025* Awesome flask! Seems durable and holds enough to get pretty darn tipsy. Lid seals tight. Pulling it out, unscrewing the lid, flipping the lid back and forth, and screwing the lid back on can be done one handed. ## Frequently Bought Together - Gsi Outdoors Boulder Flask Thermos,Unisex Adult, Unisex_Adult - SE Stainless Steel Funnel for Flasks, Small Metal Funnel for Filling Drinking Liquor Flask, Transferring Oil, Juice, Milk, Attached Screw-On Cap --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/322529497-gsi-outdoors-boulder-flask-graphite-10-fl-oz](https://www.desertcart.at/products/322529497-gsi-outdoors-boulder-flask-graphite-10-fl-oz) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-03*