I have a bunch of these but they tend to get a bit slimy inside. What is the best way to clean them?

We suggest using Bottle Bright to help clean your soft flask. https://www.amazon.com/Bottle-Bright-Tablets-Biodegradable-Hydration/dp/B06XYCVDB9/ref=sr_1_4?hvadid=616928149387&hvdev=c&hvlocphy=9028880&hvnetw=g&hvqmt=e&hvrand=2863089430132798370&hvtargid=kwd-12313741154&hydadcr=9377_13604253&keywords=bottle+bright&qid=1693921708&sr=8-4

Will they take a Katadyn BeFree filter?

Haven't tried putting the filter in, but I carry the BeFree collapsable water filter and flask with me on most of my runs, hikes, and long gravel rides. It folds up easy and weighs nothing. I have been doing this for years. Very fortunate to live in Washington where there is clean, clear water on most of the trails & mountain gravel roads up here.

osprey duro 15, will it fit the front pockets?

Hi there! Our flasks and reservoirs will fit most running vests. Please see below dimensions and compare to that of your running vest to see if they are compatible. Dimensions: 7.3 x 2.3 in

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Description

💦 Stay ahead of the pack with hydration that moves as fast as you do!

BOUNCE FREE HYDRATION - Fits snugly in hydration vests and packs to eliminate bounce and chafing during your runs.
COLLAPSIBLE CONVENIENCE - Soft TPU material shrinks as you drink, reducing movement and stashing away effortlessly.
CUSTOMIZABLE VERSATILITY - Choose between straw or bite valve with the 42mm cap to match your hydration style.
SPEED FILL CAP TECHNOLOGY - One-motion pop-open cap lets you refill quickly at aid stations without missing a beat.
ULTRA LIGHTWEIGHT DESIGN - Weighs just 41g, so you barely notice it while powering through your miles.

The HydraPak UltraFlask Speed is a 500ml collapsible soft flask designed for runners and athletes who demand ultra-lightweight, bounce-free hydration. Made from durable TPU and equipped with a quick-access SpeedFill cap, it fits seamlessly into hydration vests and packs. Its innovative collapsible design shrinks as you drink, minimizing movement and maximizing comfort. BPA-free and backed by a beyond lifetime warranty, it’s the ultimate hydration companion for serious endurance athletes.

Specifications

Brand	HydraPak
Material	TPU, PP/POM, Silicone
Bottle Type	Collapsible Water Bottle
Colour	Malibu Blue
Capacity	500 Milliliters
Special Feature	Collapsable, Straw
Product Dimensions	5.1W x 21.6H Centimeters
Product Care Instructions	Hand Wash Only
Model Name	UltraFlask Speed 500ml
Recommended Uses For Product	Sports
Number of Items	2
Theme	Hydration Bottle, Athletic
Reusability	Reusable
Shape	Round
Material Type Free	BPA Free, BPS Free, PVC Free, BPF Free, DEHP Free
Style	500ml - 2 Pack - With Drink Straws
Finish Type	Glossy
Net Quantity	2.0 Count
Package Information	Soft Bottle
Specific Uses For Product	running
Manufacturer	HydraPak
UPC	834456002901
Department	Unisex-Adult
Country of Origin	USA
Item model number	20222
ASIN	B09S8RZB94

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