---
product_id: 537636596
title: "Flux - Collapsible Backpacking Water Bottle (750ml, 1L, 1.5L) - BPA Free, Ultra Light, Spill-Proof Twist Cap"
brand: "hydrapak"
price: "$70.36"
currency: USD
in_stock: true
reviews_count: 13
url: https://www.desertcart.us/products/537636596-flux-collapsible-backpacking-water-bottle-750ml-1l-1-5l-bpa
store_origin: US
region: United States of America
---

# Fits pack pockets, compressible High flow nozzle with dust cover 50% lighter than hard bottles Flux - Collapsible Backpacking Water Bottle (750ml, 1L, 1.5L) - BPA Free, Ultra Light, Spill-Proof Twist Cap

**Brand:** hydrapak
**Price:** $70.36
**Availability:** ✅ In Stock

## Summary

> 💦 Stay hydrated, stay ahead — the Flux that fits your flow.

## Quick Answers

- **What is this?** Flux - Collapsible Backpacking Water Bottle (750ml, 1L, 1.5L) - BPA Free, Ultra Light, Spill-Proof Twist Cap by hydrapak
- **How much does it cost?** $70.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/537636596-flux-collapsible-backpacking-water-bottle-750ml-1l-1-5l-bpa)

## Best For

- hydrapak enthusiasts

## Why This Product

- Trusted hydrapak brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stands Tall, Packs Small:** Stable upright design when full, rolls up compactly when empty — hydration that adapts to your pace.
- • **Durability Meets Flexibility:** Dual-layer TPU with RF welded seams ensures rugged use without bulk or breakage.
- • **One-Handed Hydration Mastery:** Quick twist cap with dust cover lets you sip on the move without missing a beat.
- • **Ultra-Lightweight & Space-Smart:** Cut your pack weight in half and stash it anywhere — collapses to pocket size when empty.
- • **Backcountry Ready & Filter Compatible:** Seamlessly attach 42mm water filters for pure hydration anywhere your adventure takes you.

## Overview

The HydraPak Flux is a BPA-free, ultra-lightweight collapsible water bottle available in 750ml, 1L, and 1.5L sizes. Engineered with durable dual-layer TPU and RF welded seams, it offers a stable upright shape when full and compresses to pocket size when empty. Featuring a high flow twist cap with a protective dust cover and compatibility with 42mm backcountry water filters, it’s designed for seamless one-handed use and optimized for backpack pockets. Perfect for millennial professionals who demand functional, space-saving hydration on the go.

## Description

Flexible bottles get an upgrade. The Flux is shaped like a hard bottle, compresses like a softflask, and cuts weight by 50%. Topped with a dust cover and twist-drink nozzle for grab-and-go hydration, plus a bail handle to keep hydration secure in your hand or on your pack. The Flux stands upright like a hard bottle but when you finish your drink, this bottle packs down to pocket size.

Review: Much improved over the previous generation, love that it stands on its own - I've tried a few soft bottles because there's a lot of appeal for camping and traveling - lightweight and doesn't take a lot of space, and sometimes I don't want to deal a hydration bladder. They've all had issues - nalgene's would fall over due to the large wide mouth cap, platypus's were impossible to dry, and so on. Found an older model of the hydrapak flux that I loved for camping and traveling - super easy to pack, came in at least 32 oz, stood up on it's own, and was easier to clean and dry. Didn't super love the twist cap as it didn't release air so it would eventually flop over as you drank, and the mouthpiece was exposed. After the wife made me carry her double walled bottle during skiing, I bought her bottle, and I feel it's been improved in every way. It's wider so there's a more stable base, they added a flip cap, and now when you untwist, it lets air escape so the bottle will expand back to it's normal shape. They added clear plastic on the top so it's easier to see how much liquid is left, and the cap prevents leakage while still in the open twisted position. The loop is longer which makes it easier to roll up as in the pictures, but it's still kind of a pain, so I rarely do it. I'm undecided whether to just steal my wife's bottle, or buy a second one for myself. I still use hard bottles for sizes about 32 oz as I'm unsure of the sturdiness of the larger sizes, but this has become my go to whenever I want to take some water out of the house.
Review: Compact and holds shape - This collapsing water bottle has changed the game. I use this when running and what is so great about it is that the bottle will hold its shape no matter how much water is in there. And if you want to make it smaller or collapse then all you have to do is twist the top and squeeze some of the air out and it will hold to the shape that you desire. Now you don’t have to lug around an empty container once you finish it. It folds up neatly and fits in a bag saving space.

## Features

- LIGHTWEIGHT & COMPRESSIBLE: 50% lighter than a hard bottle and compresses down to pocket size when empty.
- HIGH FLOW NOZZLE: High flow drink nozzle includes protective dust cover and can be quickly opened and closed with one hand.
- FILTER COMPATIBLE: Compatible with 42mm threaded backcountry water filters including the HydraPak 42mm Filter Cap.
- FITS IN PACK POCKETS: Designed to fit in pack pockets when full and to roll up when empty for space saving storage.
- ULTRA DURABLE: Made of dual-layer ﬁlm laminate construction, with abrasion resistant TPU & RF welded seams for superior durability and elasticity.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BRBQLB8F |
| Best Sellers Rank | #12,186 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #399 in Water Bottles |
| Bottle Type | Collapsible Water Bottle |
| Brand | HydraPak |
| Brand Name | HydraPak |
| Capacity | 1 Liters |
| Color | Sutro Green |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,688) |
| Date First Available | January 27, 2023 |
| Finish Type | Glossy |
| Global Trade Identification Number | 00834456003052 |
| Included Components | 1 Collapsible Water Bottle |
| Item Dimensions LxWxH | 3.5 x 3.5 x 9.1 inches |
| Item Package Dimensions L x W x H | 12.87 x 7.24 x 3.58 inches |
| Item Weight | 102 Grams |
| Manufacturer | HydraPak |
| Material | TPU, POM |
| Material Type Free | Bisphenol A (BPA) Free |
| Model Name | FLUX 1L |
| Number of Items | 1 |
| Package Information | Flexible Bottle |
| Package Weight | 0.14 Kilograms |
| Part Number | GF420S |
| Product Care Instructions | Dishwasher Safe |
| Product Dimensions | 4.75"W x 9.1"H |
| Recommended Uses For Product | Backpacking |
| Reusability | Reusable |
| Shape | Round |
| Size | 33.8 Ounces |
| Special Feature | collapsible |
| Sport Type | Camping & Hiking, Climbing, Outdoor Lifestyle, Training, Yoga |
| Style | 1L/32oz |
| Suggested Users | Unisex-Adult |
| UPC | 834456003052 |
| Unit Count | 1.0 Count |
| Warranty Description | Lifetime Warranty |

## Product Details

- **Bottle Type:** Collapsible Water Bottle
- **Brand:** HydraPak
- **Capacity:** 1 Liters
- **Color:** Sutro Green
- **Material:** TPU, POM

## Images

![Flux - Collapsible Backpacking Water Bottle (750ml, 1L, 1.5L) - BPA Free, Ultra Light, Spill-Proof Twist Cap - Image 1](https://m.media-amazon.com/images/I/61vHsSxYF7L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Much improved over the previous generation, love that it stands on its own
*by F***1 on May 2, 2024*

I've tried a few soft bottles because there's a lot of appeal for camping and traveling - lightweight and doesn't take a lot of space, and sometimes I don't want to deal a hydration bladder. They've all had issues - nalgene's would fall over due to the large wide mouth cap, platypus's were impossible to dry, and so on. Found an older model of the hydrapak flux that I loved for camping and traveling - super easy to pack, came in at least 32 oz, stood up on it's own, and was easier to clean and dry. Didn't super love the twist cap as it didn't release air so it would eventually flop over as you drank, and the mouthpiece was exposed. After the wife made me carry her double walled bottle during skiing, I bought her bottle, and I feel it's been improved in every way. It's wider so there's a more stable base, they added a flip cap, and now when you untwist, it lets air escape so the bottle will expand back to it's normal shape. They added clear plastic on the top so it's easier to see how much liquid is left, and the cap prevents leakage while still in the open twisted position. The loop is longer which makes it easier to roll up as in the pictures, but it's still kind of a pain, so I rarely do it. I'm undecided whether to just steal my wife's bottle, or buy a second one for myself. I still use hard bottles for sizes about 32 oz as I'm unsure of the sturdiness of the larger sizes, but this has become my go to whenever I want to take some water out of the house.

### ⭐⭐⭐⭐⭐ Compact and holds shape
*by M***K on January 18, 2026*

This collapsing water bottle has changed the game. I use this when running and what is so great about it is that the bottle will hold its shape no matter how much water is in there. And if you want to make it smaller or collapse then all you have to do is twist the top and squeeze some of the air out and it will hold to the shape that you desire. Now you don’t have to lug around an empty container once you finish it. It folds up neatly and fits in a bag saving space.

### ⭐⭐⭐⭐ Good Backpacking bottles
*by J***E on September 3, 2025*

Lightweight, collapsible bottles. I just used them on a 3 day backpack trip and really liked how the 46mm mouth adapts to my BeFree filter. This system made water management much easier. Two minor issues to be aware of… rinse multiple times before use to reduce nasty plastic taste, which is not a concern with Nalgene bottles. Secondly, because they are collapsible, they have a tendency to tip over especially when empty and your hands are being used to fill them from a water filter.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-01*