What size thread filters is this compatible with?

Hello and thanks for your inquiry. The Sea to Summit Watercell is compatible with any 63mm filter.

what is the difference between ST and X models?

Hello and thank for your great question! The Watercell ST is the ideal water storage bag for camping and outdoor adventures. It's made of semi-translucent TPU and has a wide-mouth opening that is compatible with many water filters/purifiers. Similarly, the Watercell X provides water storage, but also includes an adjustable webbing strap for carrying and hanging the bag, a multi-function cap with flow control, and a small showerhead attachment. Both are great options for water storage and dispensing.

I froze it overnight with a combination of water/lemon juice to remove any potential plastic taste. No worse for the wear. Not sure how it would stand up to long term freezing.

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Description

💦 Stay hydrated, stay ahead—because adventure waits for no one!

BUILT FOR ADVENTURE - Abrasion-resistant, food-grade TPU with RF welded seams stands up to rugged outdoor use.
SMART 3 D MOLDED DESIGN - Internal baffle ensures effortless filling, draining, and drying—no spills, no fuss.
HYDRATE WITHOUT THE BULK - Carry a full 10 liters of water without weighing down your pack—only 6.7 ounces!
SEAMLESS FILTRATION READY - Wide-mouth screw top fits industry-standard filters and replacement lids for pure water anywhere.
EFFORTLESS HANDLING PACKING - Low-profile fill handle and dual grab handles double as lash points for quick, one-handed use.

The Sea to Summit Watercell ST is a premium 10-liter collapsible water storage bag crafted from durable, food-grade TPU. Weighing only 6.7 ounces, it features a 3D molded shape with an internal baffle for easy filling and drying, RF welded seams for abrasion resistance, and a wide-mouth screw top compatible with standard water filters. Designed for backpacking, camping, and all outdoor adventures, it offers lightweight, space-saving hydration with lifetime manufacturer guarantee.

Specifications

Brand	Sea to Summit
Material	Nylon
Bottle Type	Standard Bottle
Color	Smoke
Capacity	10 Liters
Special Feature	Wide Mouth
Product Care Instructions	Dishwasher Safe
Model Name	Awatcelst10
Recommended Uses For Product	Backpacking, Camping, Hiking, Sports, Travel
Number of Items	1
Theme	Modern
Reusability	Reusable
Shape	Rectangular
Style	10 Liter
Finish Type	Frosted
Specific Uses For Product	Outdoor adventures, hiking, camping, travel
Item Weight	212 Grams
Manufacturer	Sea to Summit
Global Trade Identification Number	09327868120239
Item Package Dimensions L x W x H	16.89 x 12.28 x 4.65 inches
Package Weight	0.29 Kilograms
Item Dimensions LxWxH	16.5 x 11.3 x 5 inches
Brand Name	Sea to Summit
Warranty Description	Manufacturer guarantee against defects in materials or workmanship for the lifetime of the product
Suggested Users	unisex
Part Number	643
Included Components	Components included in the description
Size	338.1 Ounces
Sport Type	Running, Hiking

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