Don't see the 28 mm cap adapter for a Sawyer filter, how do I order the caps for that?

Hi, the adapter is available on HydraPak.com in the accessory section.

What is the cap size please? Is the mouth like a normal bottle?

The cap is smaller than the caps for Nalgene bottles, but bigger than the caps for smart water bottles. I don't know the exact size by measurement or by its name.

Does anyone know if this product will be compatible with the MSR MiniWorks EX Backountry Water Filter? Thanks!

The HydraPak Seeker has a 42mm cap and the filter screws onto a 63mm bottle so this would not be compatible.

Seeker 2l Water Bottle | Desertcart KSA

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Description

💧 Stay hydrated, stay unstoppable — the Seeker fits your adventure and your lifestyle.

COMPACT POWERHOUSE - Collapses to fist-size for effortless packing and zero bulk on your next adventure.
EFFORTLESS HANDLING - Low-profile handle and large 42mm opening make filling and pouring a breeze, even on the move.
LIFETIME CONFIDENCE - Backed by HydraPak’s Beyond Lifetime Guarantee—your hydration companion for life.
FILTER READY HYDRATION - Compatible with most 42mm threaded filters, turning any water source into pure refreshment.
BUILT TO BRAVE THE ELEMENTS - Crafted from abrasion-resistant TPU, ready to freeze or hold hot liquids up to 140°F without compromise.

The HydraPak Seeker 2L is an ultra-light, collapsible water reservoir designed for outdoor professionals and enthusiasts. Made from durable TPU, it withstands freezing and hot liquids up to 60°C, features a large 42mm opening compatible with most water filters, and folds down to a compact size for easy transport. With a leakproof design, weather-resistant handle, and lifetime warranty, it’s the ultimate hydration solution for backcountry and everyday adventures.

Specifications

ASIN	B08NX82XZB
Age Range	Adult
Batteries Included?	No
Best Sellers Rank	#39,091 in Sporting Goods ( See Top 100 in Sporting Goods ) #142 in Cycling Hydration Packs #157 in Camping & Hiking Water Storage
Brand	HydraPak
Color	Mammoth Grey
Customer Reviews	4.5 4.5 out of 5 stars (2,030)
Date First Available	12 December 2020
Department	Unisex
Features	Collapsable, Leak Proof
Included Components	1 Collapsible Bottle
Item model number	A822M
Length	5.1 inches
Manufacturer	HydraPak
Material Type	TPU
Number of Items	1
Product Dimensions	12.95 x 2.54 x 32 cm; 76 g
Shape	Round
Size	2 L w/ Handle
Sport	Boating, Camping & Hiking, Climbing, Fishing, Outdoor Lifestyle
Style	2 L W/ Handle
Tank Volume	2 Liters
Usage	Outdoor Adventures, Backcountry, Remote Locations
Volume Capacity	2000 Milliliters

Reviews

B**E

taste of Plastic

I've been soaking it overnight with baking soda and lemon to come off the taste of plastic, but unfortunately not until now.

4.07.2022

E**.

Tijdens mijn fietsreizen zijn twee drinkbussen van elk 750ml niet voldoende, vooral als het heel warm is of als ik wil/moet wildkamperen. Nu vul ik de Hydrapak, die ik op mijn bagage achteraan vastmaak, en zo heb ik 2 liter extra water! Meer dan genoeg om te drinken, 's avonds eten te maken en af te wassen, en dan nog voldoende water te hebben om de volgende dag te vertrekken tot ik onderweg terug kan bijvullen! Een prima aankoop! (en ook nog eens 100% lekvrij !!!) Ik heb nu ook een tweede gekocht.

28.10.2021

服**希

登山用に購入しましたが、漏れもないし大容量だしで文句がありません。乾かすのが手間ですが、おすすめです。

13.01.2026

J**H

Great hydrapak that fits my Katadyn be free filter

29.01.2023

C**E

Very, Very Good Product & Very, Very Good Deal

3.12.2025

D**N

Résistante et étanche. Faible encombrement une fois plié et légère. Très utile en bivouac ou au camping. Bouchon ne pouvant pas être perdu et poignée pour aider à verser le contenu.

23.07.2024

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