Products · Coffee makers & gear · Ratio
Ratio Eight Series 2 Coffee Maker
Reader ratings
An automatic drip brewer whose maker lists the brew path as stainless steel, borosilicate glass and aluminum, with a stainless basket and no plastic touching hot water or coffee. The aluminum heater is the catch, and it costs $699.
Best for People who want a one-button drip brewer and will pay for a published, mostly plastic-free brew path.
- Our quality rating
- Fair (3 of 5)
- Price range
- Premium
- Size
- Brews up to 40 oz (1.25 L); glass or stainless thermal carafe
- Made in
- Designed in Portland, Oregon (stated on Ratio’s Six page); where it is made is not stated
approx. $699 with the glass carafe
See it on Ratio’s site →We are not affiliated with Ratio. This link goes to the maker’s own page, with no tracking code. How we're funded.
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Your review
Reviews are personal experiences, not research, and they never change our quality ratings. Every review is read by our team before it appears.
How we evaluated it
Why we chose it What put it on our list
- The maker names the path. Ratio’s FAQ says water meets “a stainless steel, aluminum, and glass brew path once brewing begins”, with borosilicate glass water lines and a stainless steel showerhead.
- Coffee drips into a double-wall stainless steel basket that Ratio says is “crafted without plastic”, then into a handblown borosilicate glass carafe or a double-wall stainless thermal carafe.
- Ratio says glass and steel keep plastic out of contact with hot water and brewed coffee. The plastic it names is the cold-water tank (Tritan) and a polymer body shell around a stainless steel structure.
- It is repairable. Ratio gives a 5-year warranty and sells parts, including the stainless dripper and catcher set ($55), a silicone heat lid ($8) and carafe handle gaskets ($3).
Trade-offs What to weigh before you buy
- Aluminum is in the brew path. Ratio’s Eight FAQ lists it, and its Ratio Six page says a die-cast aluminum heating element heats the water. We found no test of aluminum release from this heater.
- Every claim is Ratio’s own, and the Eight page does not name the tubing, seal or thermal-carafe lid materials. The Ratio Six page names “FDA-approved silicone” in its water path.
- It costs $699, more than 20 times a ceramic dripper, and it does the job a dripper and a kettle already do.
- The cheaper Ratio Six ($379) has a filter basket lined with a polymer unless you add the plastic-free basket.
What to know Details worth knowing first
Automatic drip brewers usually put a plastic brew basket in near-boiling water, which is one of the red flags for coffee gear. The Ratio Eight is one of the few whose maker says otherwise and lists what the water touches: stainless steel, borosilicate glass and aluminum. The basket is steel and the carafe is glass or steel, so the coffee never meets plastic. That is why it is here.
The aluminum is the honest weak spot. Ratio’s Six page says a die-cast aluminum heating element warms the water, and the Eight lists aluminum in its brew path too. It heats water from the tank rather than holding hot, acidic coffee, but we found no measurement of what it picks up. Our page on aluminum exposure explains where everyday aluminum comes from and that leaching rises with acid, long cooking times and scratched surfaces.
At $699 this is a luxury choice. A Chemex at about $50 and a $70 stainless steel stovetop kettle cost under a fifth as much and give you a hot path of glass, paper and steel with no heater to ask about. Choose the Ratio if you want the drip routine and are willing to rely on the maker’s description.
Quality & testing How it measures up against our checklist
| What we checked | What we found |
|---|---|
| Inert materials in the hot path Maker’s claim | Stainless steel, aluminum and glass once brewing begins, stated by Ratio. The aluminum heater is not glass, ceramic or stainless steel. |
| Lead-free brass Maker’s claim | Not applicable: Ratio lists no brass in the water path. |
| No non-stick coatings Not verified | No coating is described, and the page does not say whether the aluminum heater is coated. |
| Filters you can name Maker’s claim | Flat-bottom paper filters sized for the 8 to 12 cup basket, or Able’s reusable stainless steel filter; the Eight’s own basket is double-wall stainless steel. The paper’s bleaching method is not stated. |
| Built to last Maker’s claim | 5-year warranty; spare parts sold (dripper set, silicone heat lid, gaskets); certified refurbished machines offered. |
| Independent testing Not verified | None found. Materials are described only by Ratio. |
| Recalls Verified | No Ratio Eight or Ratio Six recall in the US Consumer Product Safety Commission recall database (title search, 2026-10-22). |
What the labels mean
- Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
- Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
- Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.
Sources Where our facts come from
- Ratio: Eight Series 2 Coffee Maker (materials FAQ and highlights). Maker’s page. Open ↗
- Ratio: Six Series 2 Coffee Machine (brew path FAQ, die-cast aluminum heating element). Maker’s page. Open ↗
- Ratio: spare parts. Maker’s page. Open ↗
- CPSC recall database, title search for Ratio Eight. Certifier or regulator listing. Open ↗
Where to buy Other stores and the prices we saw
- Amazon approx. $699. Sold by Ratio Coffee, the brand’s own storefront. Ships from Amazon.
Prices as we saw them on October 22, 2026. They change often. These links carry no tracking code and earn us nothing.
Alternatives Other options to compare
- Chemex Classic Six Cup Glass and paper with no heater at all, about $50. You supply the kettle and the pour.
- Ratio Six Series 2 $379. Ratio says its water touches stainless steel, borosilicate glass, aluminum and silicone, and the filter basket has a BPA-free polymer lining.