What Our Bag Size Choices Mean for the Freshness Window (Why We Sell in 8-Ounce, 12-Ounce, and 2-Pound Bags)
A question that comes up a lot on customer emails and at pop-ups is "why three bag sizes?" We could have standardized on one. We didn't. The reason is that the right bag size depends on how much coffee you drink, and the wrong bag size for your drinking speed costs you weeks of freshness.
This post is the inside view of what each bag size does to the freshness window, how we think about who each size is for, and what to do if you're between sizes.
The core tradeoff
Roasted coffee has a freshness window. The window starts after a 4 to 7 day rest period (most roasters agree you shouldn't drink coffee less than 4 days off-roast, and most specialty roasts peak around 7 to 14 days). After the rest, the cup stays at peak for about 4 to 6 weeks for filter coffee and slightly less for espresso. Past 6 weeks, the cup starts to drift — the aromatics go flat, the sweetness fades, the body loosens. Past 10 to 12 weeks, the cup is past its window.
The size of the bag changes how long the window lasts in your kitchen. A bigger bag doesn't keep coffee fresher longer; the coffee in a bigger bag ages the same as the coffee in a smaller bag. But a bigger bag contains more coffee, which means you take longer to drink it, which means the last cup you brew is older than the last cup of a smaller bag. The smaller bag gives you a shorter window of "peak" drinking time, but the peak is the same cup for the same fraction of days.
The question is: given your drinking speed, how much coffee do you want to commit to before the cup drifts past peak?
We sized our bags around common drinking speeds:
- 8 oz (227 g). For people who drink one cup a day, occasionally two. The bag lasts about 2 to 3 weeks at one cup per day, which sits cleanly inside the peak window. Everyone finishes the bag before the cup drifts.
- 12 oz (340 g). For people who drink two cups most days, occasionally more. The bag lasts about 2 to 3 weeks at two cups per day, also inside the peak window.
- 2 lb (908 g). For people who drink three or more cups per day, for households with two coffee drinkers, or for people who have a second brewing method that uses up beans (espresso plus a daily pour-over, for example). The bag lasts about 2 to 4 weeks at three cups per day, mostly inside the peak window.
If we standardized on just one size, we'd be making some drinkers sit on too much coffee (which goes stale before they finish it) and other drinkers run out too quickly. The three sizes are an attempt to match the bag size to the customer.
How we picked the weights
A few principles drove the choice.
8 oz is the smallest we'd sell. Below 8 oz, the per-bag fixed cost (the bag, the label, the seal, the shipping materials) starts to dominate the price. The arithmetic doesn't work below ~6 oz. We chose 8 oz because it's just above the floor and roughly one cup a day for two weeks.
2 lb is the largest we'd sell. Above 2 lb, the bag becomes awkward to store, hard to seal properly after opening, and the freshness window at typical drinking speeds starts to push past the peak. We chose 2 lb because that's the largest size where someone drinking three cups a day can finish before drifting past peak. Past 2 lb, we'd be asking customers to drink stale coffee.
12 oz fills the middle. The 12 oz bag is for people who drink more than the 8 oz provides but less than the 2 lb requires. It's also a useful "shared" size for two people drinking each one cup per day.
The 8 oz and the 2 lb are the workhorse sizes; the 12 oz is the flexible middle.
What goes wrong with each size
A few common problems customers mention, and what to do about them:
The 8 oz goes stale in your kitchen. You're drinking less than one cup per day. The bag is bigger than your drinking speed. Either buy the 8 oz more often (fresh coffee weekly), or step down to a smaller bag if we offered one — but we don't, so the answer is to brew the bag more aggressively (espresso shots, stronger ratio) or accept that some weeks you'll have a slightly past-peak cup.
The 2 lb bag runs out before you finish. You're drinking faster than the bag assumes. Either step up to two bags per month, or accept that you'll run out and need to buy more. We don't recommend buying more than the 2 lb bag because the per-gram cost goes up but the freshness window doesn't extend.
The 12 oz is too much for you, but the 8 oz is too little. This is the most common email. The honest answer is: pick the 8 oz, brew a slightly stronger ratio to make the bag feel like more coffee, and accept that you'll order more often. Or buy the 12 oz and accept that the bag will last longer than the peak window.
You want to mix two single origins in a week. Get two 8 oz bags rather than one 12 oz. The smaller bag sizes preserve freshness better when you're alternating between two coffees, and the cost is roughly the same.
You want to give coffee as a gift. The 8 oz and 12 oz are both gift-friendly. The 2 lb is a substantial gift for a serious coffee household.
Sealed bags and opened bags
One clarification on the freshness window. We're talking about opened bags, not sealed bags.
A sealed bag, with the degassing valve intact and the seal unbroken, slows aging substantially. We roast on Wednesday, seal the bag Thursday, and ship it Monday or Tuesday of the following week. The bag arrives at your door 7 to 10 days off-roast. The seal is unbroken. The valve is letting CO2 escape without letting oxygen in.
The clock really starts when you break the seal. After you break the seal, the bag is open to your kitchen's air. Oxygen starts working on the coffee. The bag's zipper keeps air out between sessions but isn't perfectly airtight. Coffee that's been in an opened bag for 5 weeks tastes different from coffee that's been in an opened bag for 5 days — even if both were sealed at the same time before opening.
This is why the bag sizes matter. If you break the seal and then take 6 weeks to drink the bag, the last cups are not as good as the first ones. The bag size should match your drinking speed after opening.
How we package
A note on packaging, since the question comes up.
Our bags are foil-lined, with a one-way degassing valve and a zip closure. The foil blocks light and most oxygen transmission. The valve lets CO2 (which roasts off in the first 24 to 48 hours) escape without letting oxygen in. The zip closure gives you a reseal after opening.
We considered (and rejected) a few alternatives:
- Clear bags. Cheaper and let you see the coffee, but they let in light, which ages the cup faster. We chose foil-lined for the shelf life.
- Valveless bags. Cheaper but require a longer rest period before sealing. The coffee off-gasses in the bag and can pop the seal if sealed too early. We chose valves for the convenience.
- Tin-tie bags. The classic look but the tin tie doesn't reseal as well as a zip closure. We chose zip closure for the ease of use.
- Nitrogen-flushed bags. Extended shelf life up to a year. Significantly more expensive. We chose standard packaging because we roast frequently enough that shelf life isn't a real concern.
This isn't the only way to package coffee. It's the way we package it, and the reasons are practical.
What to do with a bag that's at the edge
If you have an opened bag that's 5 to 6 weeks off-roast and you're not sure whether it's still good, here's how to evaluate:
- Smell it. If the coffee smells like cardboard or paper, it's past peak. If it smells flat but not off, it's at the edge. If it still smells like the roast notes, it's still drinkable.
- Brew a cup. If the cup tastes significantly flatter than when you opened the bag, it's past peak. If it tastes slightly less aromatic but still balanced, it's at the edge.
- Use it for espresso or strong brew. Coffee at the edge is usually better as a more concentrated brew (espresso, Aeropress inverted, strong French press) than as a delicate pour-over. The concentration makes the past-peak character less obvious.
If you find yourself with a bag that's clearly past peak, don't throw it out — there are uses for older coffee. Old coffee is fine for baking, for cold brew concentrate, for adding to compost, and for some espresso blends where it adds body. But for a daily pour-over where you can taste the difference, fresh is better.
What we'd change about the size lineup
If we were starting from scratch, we'd consider:
- A 4 oz or 6 oz sample size. Customers often want to try a coffee before committing to a full bag. We don't currently offer this, but we've been asked enough that it's a possibility for the future.
- A 5 lb bulk option. A small percentage of our customers drink a lot of coffee. A 5 lb option would give them better per-gram pricing without forcing them to buy multiple 2 lb bags. It's not on the roadmap yet, but it's been on the list for a while.
Neither of these is imminent. The current three sizes cover most drinkers well. If we add new sizes, it's because the customers have clearly asked for them, not because we want to add complexity.
The bottom line
The bag size you should pick is the one that lets you finish the bag inside the freshness window. If you drink one cup a day, get the 8 oz. If you drink two, get the 12 oz. If you drink three or more, or share with another coffee drinker, get the 2 lb. If you're between sizes, get the smaller and brew more cups; or get the larger and accept that the last cups will be slightly past peak.
We didn't add three sizes to make the catalog look complicated. We added three sizes to let the cup taste as fresh as possible when you brew the last scoop.
See our single-origin catalog.
See our post on what the roast date on the bag means.
P.S. If you're between sizes and want a quick rule of thumb: take the bag size in ounces, divide by your daily cups, and that's the number of weeks the bag will last. If that number is 3 weeks or less, the bag will stay inside the freshness window. If it's more than 3 weeks, the last cups will be past peak.
— Seraphina