Replacing a water bottle lid sounds simple until you're standing in front of a dozen options and have no idea which one fits or does what you need. Wide mouth. Standard mouth. Loop lid. Chug lid. Straw lid.
Here's the straightforward guide to picking the right replacement lid — and the three NuRich options that cover most scenarios.
First: Know Your Bottle's Mouth Size
Before anything else, you need to know whether your bottle has a wide mouth or standard mouth opening. This is the most important factor — a wide mouth lid won't thread onto a standard mouth bottle and vice versa.
Wide mouth openings measure approximately 2.28 inches (58 mm) in diameter. Most 32 oz and larger bottles from Hydro Flask, Klean Kanteen, Simple Modern, NuRich, Tal, and Nalgene wide-mouth use this size.
Standard mouth openings are narrower — approximately 1.77 inches (45 mm). Common on 12, 18, and 21 oz versions of Hydro Flask, Klean Kanteen, and similar brands.
Not sure which you have? Wide mouth is wide enough to drop ice cubes in easily. Standard mouth requires slim or crushed ice.
Then: Pick the Right Style
Best for sipping on the go: NuRich Loop Lid — $9.99
The NuRich Loop Lid fits any wide mouth bottle with a 2.28 in / 58 mm opening. It has a carry loop for easy one-handed transport and a clean twist-off top for drinking.
This is the lid to grab if you're replacing a lost or cracked wide mouth lid, or upgrading from a basic cap to something more functional. Dishwasher safe, top rack.
Fits: Wide mouth bottles (2.28 in / 58 mm opening)
Best for: Hiking, gym, daily carry — any situation where you sip and move
Best for standard mouth bottles: NuRich Sport Cap — $12.99
The NuRich Sport Cap is designed for standard mouth openings and features an insulated body that helps maintain your bottle's temperature. Compatible with 12, 18, 21, and 24 oz standard-mouth bottles from Hydro Flask, Tal, Klean Kanteen, and Simple Modern.
Fits: Standard mouth bottles (approx. 45 mm opening)
Best for: Smaller bottles carried in bags, cup holders, or bike cages
Best wide mouth chug lid: NuRich Wide Mouth Spout Cap — $12.99
If you prefer a chug-style spout on your wide mouth bottle — rather than a twist-off top — the NuRich Wide Mouth Spout Cap is the pick. Twist-chug design for fast hydration without removing the lid entirely.
Fits: Wide mouth bottles (same 58 mm opening as Loop Lid)
Best for: Workouts, sports, anyone who needs faster access mid-activity
Quick Reference
| Lid | Mouth Size | Style | Price |
|---|---|---|---|
| Loop Lid | Wide mouth (58 mm) | Carry loop, twist-off top | $9.99 |
| Sport Cap | Standard mouth (~45 mm) | Insulated replacement cap | $12.99 |
| Spout Cap | Wide mouth (58 mm) | Twist-chug spout | $12.99 |
One Last Thing: Don't Overthink It
If you have a wide mouth bottle and just want a solid replacement lid — the Loop Lid at $9.99 is the right call for most people. Simple, functional, fits nearly every wide mouth bottle made in the last decade.
If you need a spout or your bottle is standard mouth, the Sport Cap or Spout Cap covers it. Every NuRich lid purchase contributes to active waterway cleanup — not just good for your bottle, good for what comes out of it.