--- product_id: 182833056 title: "GSI Outdoors, Boulder 10 Flask, Rugged and Shatter-Resistant, Outdoor Hip Flask, Sand, 10 Fl oz, Color: Graphite" brand: "gsi outdoors" price: "¥12225" currency: JPY in_stock: true reviews_count: 10 category: "Gsi Outdoors" url: https://www.desertcart.jp/products/182833056-gsi-outdoors-boulder-10-flask-rugged-and-shatter-resistant-outdoor store_origin: JP region: Japan --- # Molded graduation marks for precision 10 fl oz rugged capacity Shatter-resistant copolyester build GSI Outdoors, Boulder 10 Flask, Rugged and Shatter-Resistant, Outdoor Hip Flask, Sand, 10 Fl oz, Color: Graphite **Brand:** gsi outdoors **Price:** ¥12225 **Availability:** ✅ In Stock ## Summary > 🥾 Elevate your outdoor vibe—sip smart, sip rugged! ## Quick Answers - **What is this?** GSI Outdoors, Boulder 10 Flask, Rugged and Shatter-Resistant, Outdoor Hip Flask, Sand, 10 Fl oz, Color: Graphite by gsi outdoors - **How much does it cost?** ¥12225 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/182833056-gsi-outdoors-boulder-10-flask-rugged-and-shatter-resistant-outdoor) ## 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 - • **Sleek & Portable:** Compact 10 fl oz kidney shape fits perfectly in your pack or pocket for on-the-go sipping. - • **Precision Hydration:** Integrated molded graduation marks let you track your beverage levels without guesswork. - • **Sip with Confidence:** Wide mouth design and hinged silicone cap ensure effortless filling, pouring, and grip—even in cold weather. - • **Trail-Ready Toughness:** Crafted from shatter-resistant copolyester to survive every adventure bump and drop. - • **BPA-Free & Flavor Neutral:** Enjoy your favorite drinks without any plastic aftertaste, guaranteed safe and clean. ## Overview The GSI Outdoors Boulder 10 Flask is a durable, 10 fl oz outdoor hip flask made from shatter-resistant copolyester with a wide mouth and hinged silicone cap for easy use. Featuring molded graduation marks for precise beverage tracking, it’s BPA-free and designed to withstand rugged adventures while maintaining a sleek, portable profile. ## Description Product description Celebrate your outdoor adventures 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 on-the-trail sippin’ without any foul taste from the flask material. Don’t leave camp without this handy companion by your side! 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. Review: Perfect! - 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. ## Features - Wide mouth makes for easy filling, pouring and drinking. - Convenient molded graduation marks. - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07W6B1Z5V | | Best Sellers Rank | #231,350 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #72 in Camping & Hiking Hydration Flasks | | Brand | GSI Outdoors | | Brand Name | GSI Outdoors | | Color | Graphite | | Customer Reviews | 4.6 out of 5 stars 312 Reviews | | Finish Type | Graphite | | Finish Types | Graphite | | Item Dimensions D x W x H | 1.1"D x 3.7"W x 6.5"H | | Manufacturer | GSI Outdoors | | Manufacturer Part Number | 79346 | | Material | Copolyester, Silicone | | Material Type | Copolyester, Silicone | | Model Name | Boulder 10 Flask | | Model Number | 79346 | | Product Dimensions | 1.1"D x 3.7"W x 6.5"H | | Shape | Kidney | | Unit Count | 1.0 Count | | Volume | 10 Fluid Ounces | ## Product Details - **Brand:** GSI Outdoors - **Color:** Graphite - **Finish Type:** Graphite - **Material:** Copolyester, Silicone - **Product Dimensions:** 1.1"D x 3.7"W x 6.5"H ## Images ![GSI Outdoors, Boulder 10 Flask, Rugged and Shatter-Resistant, Outdoor Hip Flask, Sand, 10 Fl oz, Color: Graphite - Image 1](https://m.media-amazon.com/images/I/61rqHnxqh4L.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 ### ⭐⭐⭐⭐⭐ Stylish and Reliable *by J***9 on June 13, 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 April 22, 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. ### ⭐⭐⭐⭐⭐ Quality convenient drink on the go. *by A***R on July 20, 2025* Great quality and good size ## 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.jp/products/182833056-gsi-outdoors-boulder-10-flask-rugged-and-shatter-resistant-outdoor](https://www.desertcart.jp/products/182833056-gsi-outdoors-boulder-10-flask-rugged-and-shatter-resistant-outdoor) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-06*