Cold Brew At Home
The stopper is the smallest part of the Toddy Cold Brew System and the one that causes the most confusion. It plugs the drain hole in the bottom of the brewing container while the coffee steeps, and you pull it out to let the concentrate run down into the glass decanter. When it is fitted correctly you forget it exists. When it is not, you find a puddle of coffee under the brewer the next morning.
Almost every stopper problem traces back to one of five things, and most of them take less than a minute to fix.
How the stopper is supposed to fit
Toddy’s own brewing guide is specific about this: the stopper goes into the drain hole from the outside of the brewing container, not from inside.
- Start with the brewer empty and the felt filter not yet in place.
- Turn the container over so you can see the drain hole on the base.
- Press the stopper into the hole from underneath. Push gently. It does not need force.
- Give it a quarter turn. That small twist is what seats it and makes the seal.
- Turn the container upright, wet the felt filter, and press it flat into the recess in the bottom so it covers the hole evenly.
Fitting it from the outside matters for a practical reason. Once the brewer is full of soaked grounds, you need to be able to reach the stopper and pull it out. A stopper pushed in from the inside sits under the grounds where you cannot get at it, and it rarely seals properly anyway.
Why your Toddy is leaking, and how to fix it
1. The stopper went in from the inside
This is the most common cause for new owners, and the easiest fix. Empty the brewer, remove the stopper, and refit it from underneath as described above.
2. It was pushed in but never twisted
A stopper that is simply jammed into the hole can look seated while leaving tiny gaps around the edge. Take it out and refit it with the quarter turn. If it still weeps, try a second quarter turn rather than pushing harder.
3. It was pushed in too hard
Toddy specifically warns against forcing the stopper, because too much pressure can crack the area around the drain hole. If you have been leaning on it to stop a leak, check the base of the brewer for a hairline crack. A cracked brewer cannot be fixed by a new stopper, and the container will need replacing.
4. The felt filter is not lying flat
The filter sits on top of the drain hole from the inside. If it is folded, bunched, or sitting off-center, it can lift the stopper slightly and break the seal, or let grounds slip past the edge. Smooth the damp filter flat into the recess before you add any coffee.
5. The stopper has worn out
Stoppers do not last forever. Over time they can harden, lose their shape, or develop small cracks, especially if they go through a hot dishwasher cycle often. Toddy’s current home kits list the stopper as silicone, while some replacement packs are natural rubber. Either way, if a stopper no longer feels soft and springy, or you can see splits in it, replace it. Replacements are cheap and usually sold in packs of two.
One more cause worth ruling out: scratches or nicks in the bottom of the brewer. Toddy warns against using sharp utensils inside the container, because damage near the base can leak no matter how good the stopper is.
When the concentrate will not drain
The opposite problem happens too. You pull the stopper and the concentrate barely trickles out, or stops altogether. That is not a stopper fault. It is almost always grounds clogging the felt filter, usually because the coffee was ground too fine.
Toddy’s fix is simple. Take the rounded, blunt end of a dinner knife and gently poke it down through the grounds until the tip touches the filter. That opens a channel and gets things moving. Do not stir the grounds or press down on them, because that forces fine particles through the felt and leaves you with gritty concentrate.
For the next batch, go coarser. A grind close to coarse sea salt is right for cold brew, and our grind size guide shows what that looks like.
Losing the stopper
Because it is small and comes out every batch, the stopper is the part people most often lose down the drain or in the back of a drawer. A few habits help:
- Put it straight into the empty brewer as soon as you have pulled it, so it travels with the container to the sink.
- Wash it by hand with the brewer instead of tossing it in the dishwasher basket, where it can fall through.
- Keep one spare in the box with your replacement filters.
Cleaning the stopper
Rinse it in warm water after every batch and let it dry with the brewer. Coffee oils build up on it the same way they build up on the filter, so give it a quick wipe with a soft cloth now and then. Avoid harsh scrubbing pads, which can roughen the surface that does the sealing. If you are dealing with a musty smell or spots anywhere in the system, our mold guide walks through a full clean.
Is the stopper a reason to skip the Toddy?
Honestly, no. It is the one fiddly part of an otherwise very simple brewer, and once you have fitted it correctly a couple of times it becomes automatic. Some people do prefer brewers with a built-in tap instead, and if that sounds like you, our Toddy vs. OXO comparison covers that trade-off. For everything else about the system, see our full Toddy Cold Brew System review.
FAQ
Which way does the Toddy stopper go in?
From the outside. Turn the empty brewer over, press the stopper into the drain hole from underneath, and give it a quarter turn to seal.
Why is my Toddy leaking around the stopper?
Usually because it was fitted from the inside, was not twisted to seat it, the filter is not flat, or the stopper has hardened or cracked. A cracked brewer base can also leak.
Can I buy a replacement Toddy stopper?
Yes. Replacements are sold by coffee equipment retailers and on Amazon, usually in packs of two.
Should I press the grounds to make it drain faster?
No. That pushes sediment through the filter. Gently poke the blunt end of a dinner knife through the grounds to the filter instead.