Quick Answer

Replacing the stopper in your Zojirushi bottle is a straightforward fix for leaks or wear. You need the correct replacement stopper set for your model, then follow these steps: remove the old stopper, clean the bottle opening, and install the new stopper until it clicks into place.

Why Replace the Stopper?

Over time, the stopper in your Zojirushi bottle can wear out, causing leaks or reduced insulation. Replacing it restores the seal and keeps your drink hot or cold. The stopper is a separate part from the lid, so you don't need to replace the entire lid assembly.

Choosing the Right Stopper Set

Zojirushi offers stopper sets specific to mug models. For example, the Stopper Set for SM-NAE (SKU S87-6B) is designed for SM-NAE vacuum insulated mugs. The Stopper Cover Set (Red) for SM-SD (-RC) Clear Red excludes the stopper set itself, so verify you need the full set if your stopper is worn. Check your bottle's model number (usually on the bottom) to match the correct part.

Step-by-Step Stopper Replacement

  1. Step 1: Remove the Old Stopper: Open the bottle lid fully. Locate the stopper—usually a small plastic or silicone piece attached to the lid's underside. Gently pull it out or unscrew it, depending on your model. Some stoppers have a tab you can lift. Don't force it; if it's stuck, check for a screw or clip. Forcing can break the lid.
  2. Step 2: Clean the Bottle Opening: Wipe the rim and interior of the bottle opening with a damp cloth to remove any residue or old sealant. Let it dry completely before installing the new stopper. Moisture or debris can prevent a good seal, leading to leaks.
  3. Step 3: Install the New Stopper: Take your new stopper set (e.g., the Stopper Set for SM-NAE) and align it with the opening. Press down firmly until you hear a click or feel it snap into place. Ensure it sits flush and doesn't wobble. If it doesn't click, you might have the wrong part or it's not fully seated. Double-check model compatibility.
  4. Step 4: Test the Seal: Fill the bottle with water, close the lid, and turn it upside down over a sink. Check for any drips. If it leaks, remove and reinstall the stopper, ensuring it's properly aligned. A small leak often means the stopper isn't seated flat. Repeat step 3 if needed.

Replacement Parts That Fit

  • Stopper Set for SM-NAE: The Stopper Set for SM-NAE is a replacement part from Zojirushi, designed for use with SM-NAE vacuum insulated mugs. It is offered under SKU code S87-6B as a Standard option. If you own an SM-NAE mug, this is the exact stopper set you need to fix leaks or restore the seal.
  • Stopper Cover Set (Red) for SM-SD (-RC) Clear Red **EXCLUDES STOPPER SET: The Stopper Cover Set (Red) for SM-SD (-RC) Clear Red **EXCLUDES STOPPER SET This cover set includes only the outer red cover, not the internal stopper mechanism. If your stopper itself is leaking, you need a full stopper set, not just the cover.