French Press (glass/steel)

Material Composition Assumptions

A typical French press weighs approximately 600 grams and consists of three primary material categories. Borosilicate glass forms the main brewing vessel, accounting for 280-300 grams or roughly 47% of total weight. The structural framework, plunger mechanism, and integrated metal filter are constructed from food-grade stainless steel, contributing 250-270 grams or approximately 42% of product weight. Rubber or silicone sealing components provide airtight operation and represent the remaining 50-60 grams or about 9% of total mass. The durable construction enables extended product lifecycles compared to single-use brewing systems.

Manufacturing Geography

China serves as the dominant manufacturing hub for French press coffee makers due to established glassware and stainless steel processing capabilities. The Chinese manufacturing sector benefits from integrated supply chains that can efficiently combine borosilicate glass production with precision metalworking operations. However, the carbon-intensive electricity grid in China, with an average intensity of 555 gCO2/kWh, contributes meaningfully to manufacturing emissions. European manufacturers in Germany and Czech Republic produce premium variants using cleaner grid electricity, though at higher costs.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China	555 gCO2/kWh	32	Baseline
Germany	366 gCO2/kWh	29	-9%
Czech Republic	384 gCO2/kWh	30	-6%
India	708 gCO2/kWh	36	+13%
France	57 gCO2/kWh	24	-25%

Provenance Override Guidance

1. Material specifications including exact steel grade composition, glass type, and recycled content percentages for all components.
2. Manufacturing facility location with specific electricity grid connection data or renewable energy procurement documentation.
3. Transportation logistics detailing shipping methods, distances, and modal split from factory to distribution centers.
4. End-of-life material recovery rates and recycling partnerships specific to the manufacturer’s take-back programs.
5. Product durability testing results and warranty terms that establish expected useful lifetime beyond standard assumptions.

Methodology Notes

• The CCI score represents cradle-to-gate manufacturing emissions plus estimated use-phase impacts over a ten-year product lifetime assuming daily brewing cycles.
• Scope 3 emissions dominate due to energy-intensive glass and steel production processes occurring upstream in material supply chains.
• Functional unit assumes standard 34-ounce capacity with typical brewing frequency patterns for household coffee consumption.
• Coffee beans and ongoing consumables are excluded from the product-level assessment but represent the largest lifecycle impact driver.
• Regional electricity grid variations during manufacturing create meaningful differences in total product footprint.
• Data gaps exist for specialized seal materials and minor hardware components that contribute marginally to overall emissions.