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🥾 Stay refreshed on the trail with the Boulder Flask—your sleek, tough hydration sidekick!
The GSI Outdoors Boulder Flask is a compact, 10 oz thermos crafted from durable compound material, designed for unisex adult use. Lightweight at 122 grams and featuring a stylish sand purple color, it’s ideal for camping, hiking, and everyday carry. With a strong 4.6-star rating and practical design, it balances portability and toughness for outdoor enthusiasts.
| ASIN | B07YVKXMH3 |
| Age range | Adult |
| Batteries included? | No |
| Best Sellers Rank | 157,182 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 146 in Camping & Hiking Flasks |
| Brand | GSI Outdoors |
| Color | Purple (Sand) |
| Customer Reviews | 4.6 4.6 out of 5 stars (628) |
| Date First Available | 5 Aug. 2019 |
| Department | Unisex |
| Included components | Thermos + Manual |
| Item model number | 79343 |
| Manufacturer | GSI OUTDOORS |
| Material type | compound |
| Number of items | 1 |
| Product Dimensions | 10 x 10 x 6 cm; 122 g |
| Shape | Rectangular |
| Size | 6 OZ |
J**N
Useful
Useful flask, however cap doesn’t entirely clear filler when unscrewed so you have to drink slightly offset. Other than that, very good.
R**E
Small crush on snowboard and this cracked
Unfortenly after one small crush on snowboard this cracked and make my jacket and all gear sticky in juice witch was inside Looks nice is light Byt metal one will ne wayy more suitable for me
B**N
It's just okay = overpriced in my opinion.
I like the idea of it and the design, sadly the build quality is, literally, a little rough around the edges. I would have been happy to pay £15 for it.
F**S
Bastante resistente, compacta y ligera. No tiene fugas y se puede guardar hasta en una sudadera por el tamaño.
F**S
Passt viel rein
P**D
lightweight and easy to fill
J**9
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.
T**R
Absolutely love it! Took this on a 4 night hike, and it held just enough for me to have a few drinks every night. It is very light in comparison to metal flasks, also super sturdy and leak proof. A perfect hiking companion. I really really like this product. 100% recommended!
Trustpilot
1 day ago
1 month ago