# Coffee Guide — Posts — Blue Bottle Coffee Lab

## [Leading Toward a New Era in Coffee](https://blog.bluebottlecoffee.com/posts/precommercial-trials)
**Blue Bottle Sponsors Pre-Commercial Trial Site for New Coffee Varieties**  
*Audrey Waldrop* — October 27, 2025

## [Brew Theory: Extraction, Strength, and Finding the Sweet Spot for Pour Over Coffee](https://blog.bluebottlecoffee.com/posts/brew-theory-extraction-strength-and-finding-the-sweet-spot-for-pour-over-coffee)
**The “why” behind our brew method**  
*Tom Purtill* — June 21, 2023

## [Tasting Towards the Future with WCR](https://blog.bluebottlecoffee.com/posts/tasting-towards-the-future-with-wcr)
**A cupping journal from our Green Coffee team**  
*Tom Purtill* — September 30, 2021

## [Sustainable Coffee Sourcing at Blue Bottle](https://blog.bluebottlecoffee.com/posts/responsibly-sourced)
**How data helps drive our sustainable coffee sourcing**  
*Tom Purtill* — September 1, 2021

## [A Conversation with Jeanine Niyonzima-Aroian](https://blog.bluebottlecoffee.com/posts/a-conversation-with-jeanine-niyonzima-aroian)
**The Founder of JNP Coffee on her inclusive business model**  
*Tom Purtill* — March 25, 2021

## [Mayra Orellana-Powell in Conversation](https://blog.bluebottlecoffee.com/posts/mayra-orellana-powell-in-conversation)
**Updates on Catracha Coffee Company**  
*Tom Purtill* — March 18, 2021

## [Aida Batlle in Conversation](https://blog.bluebottlecoffee.com/posts/aida-batlle-in-conversation)
**Updates from the legendary producer on a hard year**  
*Tom Purtill* — March 11, 2021

## [Acidity in Coffee](https://blog.bluebottlecoffee.com/posts/acidity-in-coffee)
**Why It Matters**  
*Tom Purtill* — February 16, 2021

## [This Year’s Honduran Single Origins](https://blog.bluebottlecoffee.com/posts/honduran-single-origins)
**Coffees to drink every single day**  
*Tom Purtill* — February 3, 2021

## [How to Brew Large Batches of Coffee](https://blog.bluebottlecoffee.com/posts/how-to-brew-large-batches-of-coffee)
**For those times when you want to brew enough coffee to share or drink throughout the morning, we recommend using an eight-cup Chemex or an eight-cup French press.**  
*Tom Purtill* — December 22, 2020

## [The Craft of Blends](https://blog.bluebottlecoffee.com/posts/coffee-blends)
**Why we love our comforting blends and how we make them**  
*Tom Purtill* — December 15, 2020

## [Celebrating Innovation with our Costa Rica Coffee Set](https://blog.bluebottlecoffee.com/posts/celebrating-innovation-with-our-costa-rica-coffee-set)
**Blue Bottle gives back to World Coffee Research**  
*Tom Purtill* — November 25, 2020

## [Costa Rica: An Origin of Micromills](https://blog.bluebottlecoffee.com/posts/costa-rica-an-origin-of-micromills)  
*Tom Purtill* — November 10, 2020

## [Origin Spotlight: Kenya](https://blog.bluebottlecoffee.com/posts/origin-spotlight-kenya)
**From the Coffee Sourcing Team**  
*Tom Purtill* — October 5, 2020

## [Your New Oji](https://blog.bluebottlecoffee.com/posts/oji-how-to-assemble-and-brew)
**How to assemble and brew**  
*Tom Purtill* — September 28, 2020

## [Introducing Our New Cold Brew Menu](https://blog.bluebottlecoffee.com/posts/our-new-cold-brew-menu-in-southern-california)
**Exclusive to our Southern California cafes, now you can taste cold brew’s full range**  
*Tom Purtill* — August 19, 2020

## [The Blue Bottle Cold Brew Collection](https://blog.bluebottlecoffee.com/posts/the-blue-bottle-cold-brew-collection)
**The best coffee and tools for making cold brew at home**  
*Tom Purtill* — August 14, 2020

## [Exceedingly Rare](https://blog.bluebottlecoffee.com/posts/exceedingly-rare)
**Coffees that rattle our expectations**  
*Tom Purtill* — July 29, 2020

## [Behind Our Latest Single Origin From Los Vascos](https://blog.bluebottlecoffee.com/posts/behind-our-latest-single-origin-from-los-vascos)
**Helping our partners during harvest during COVID-19**  
*Tom Purtill* — July 18, 2020

## [How to Choose the Right Brew Method for You](https://blog.bluebottlecoffee.com/posts/how-to-choose-a-brew-method)
**From straightforward to geeky, 6 ways to make coffee at home**  
*Tom Purtill* — July 17, 2020