AeroTemper
AeroTemper holds the AeroPress filter cap at a 20-degree draining angle and uses a perforated tamper, a little water, light pressure, and three or more smooth twists to wet and seat one to three paper filters.
What AeroTemper is
AeroTemper holds the AeroPress filter cap at a 20-degree draining angle and uses a perforated tamper, a little water, light pressure, and three or more smooth twists to wet and seat one to three paper filters.
The two-part filter-cap base and perforated tamper remain in testing, and the release files and tested print profile are public on MakerWorld. The whitepaper is still in preparation.
A paper filter can crease, lift at an edge, or sit unevenly while it is placed and rinsed. Correcting that under time pressure costs attention before the brew has even begun, and an unnoticed crease can leave the paper seated differently from one brew to the next. The problem is operational first: the brewer needs a quick way to wet the full paper, inspect the edge, and leave the filter attached to the cap instead of lifting it again with the preparation tool.
AeroTemper targets paper-filter preparation: wetting coverage, visible seating against the cap, edge creases, and drainage before the cap is attached to the brewer. Those are observable setup conditions. The tool does not directly measure flow, pressure, extraction, or cup quality, and a flat-looking filter is not proof that every microscopic path through the paper is identical.
- Place the AeroPress filter cap in the base. The 20-degree tilt lets excess rinse water flow toward the outlet and leave the cap instead of pooling around the paper.
- Place one, two, or three paper filters inside the cap, then set the perforated AeroTemper tamper on top before adding water.
- Add only a little hot water—roughly ten drops is a useful mental picture, but there is no need to count.
- Use light pressure and twist the tamper smoothly at least three times. Pressing too firmly can wrinkle the paper.
- Lift the tamper and inspect the paper edge. Because the tamper face is perforated, it presents less continuous contact area than a smooth face; the intended result is for the wet paper to remain seated against the cap instead of following the tamper upward.
- Let any excess water run toward the low side of the cap and drip through the cutout in the angled base before moving the prepared cap into the brew workflow. A thicker filter stack may drain more slowly.
- When paper filters sometimes crease or lift during a fast wetting step.
- When a competition workflow needs one repeatable filter-preparation motion and a clear visual endpoint.
- When excess rinse water otherwise pools in the cap or spills during transfer.
- When comparing filter-preparation methods while keeping filter type, water dose, cap, and inspection criteria constant.
- It does not prove that filter wetting or tamping improves flavor, extraction yield, or competition results.
- It cannot repair a torn, damaged, or incorrectly sized paper filter.
- It does not control grind, water composition, agitation, pressing, bypass, or final service.
- It adds a preparation step and may be unnecessary when the normal filter workflow is already fast, flat, and repeatable.
- The 20-degree tilt describes the current testing geometry, not a claim that this angle is uniquely optimal.
- The 20-degree base measures 6.0 × 10.7 × 8.9 cm (2.36 × 4.21 × 3.50 in), and the perforated tamper measures 6.3 × 6.3 × 2.4 cm (2.48 × 2.48 × 0.94 in).
- Print sideways with a 0.4 mm nozzle or smaller. The base uses tree-hybrid supports at a 5-degree threshold from the build plate only.
- PETG is preferred for tamper heat resistance and longevity. PLA can be used with room-temperature rinse water; do not pour boiling water onto a PLA tamper.
- The current complete-pair slice is approximately 4 hours 15 minutes and 160 g (0.35 lb) of filament.
- The current design is intended for all AeroPress models, including polymer and metal versions.
- The tamper surface must be smooth enough not to abrade or tear wet paper, including around every printed hole.
- For parts used around coffee, avoid a brass nozzle. Prefer a dedicated stainless-steel nozzle and PLA or PETG whose manufacturer documents food-contact suitability; the finished print still depends on printer cleanliness, surface finish, use, and cleaning.
- Prefer a moist towel or gentle hand washing, let both parts air-dry completely, and stop using a print that develops rough edges, deformation, trapped residue, or unreliable cap fit. AeroTemper is not dishwasher safe.
Testing
AeroTemper is most relevant when a brewer already has a stable recipe but wants filter preparation to consume less attention and end at the same visible condition during timed practice or competition setup.
Brew Supply is independent and not affiliated with AeroPress or the World AeroPress Championship. Testing hardware can still change; confirm fit, cleaning, material, heat, and competition-rule suitability for the exact version you use.
A filter crease can make seating visibly uneven and may create a preferential path for water, but AeroTemper has not yet established a measured extraction or sensory benefit. During Jan Ahrend's second-place routine at the 2025 World AeroPress Championship, correcting a creased filter consumed valuable preparation time; that incident informed the workflow problem, but it is not presented as a cause of the placing or the cup result.
Start with the workflow problem, not the promise of a better cup
A useful precision tool should make one decision or physical action easier to repeat. The first test is therefore operational: can you describe what changed, hold the surrounding recipe steady, and return to the same setup on the next brew? Taste still matters, but taste should be evaluated after the tool has demonstrated that it controls the narrower variable it claims to address.
Compare the normal workflow with the tool-assisted workflow using the same coffee, dose, water, grind, timing, and service target wherever possible. Record mistakes and setup time as well as successful brews. A tool that creates a cleaner measurement but adds too much friction may be valuable for structured testing and unnecessary for everyday brewing. That tradeoff is part of the result rather than something to hide.
Do not change several Brew Supply tools at once when the goal is to learn what one of them contributes. Add the smallest useful control, repeat the comparison, and keep an exit path back to the simpler method. This makes the product easier to judge honestly and prevents a complete competition setup from becoming more complicated than the recipe needs.
AeroTemper is in active testing. Public documentation describes the current workflow and the claims Brew Supply is prepared to make, but testing status still means the design can change. Check the linked release hub and documentation for the current file, version, material notes, and limitations before printing or using it in a competition setup.
Brew Supply separates an idea, a documented workflow, and a downloadable release. A landing page can exist before a file so the intended use and limitations are clear, but it must not turn a planned concept into an availability claim. When files are published, the download destination—not an old screenshot or copied model—is the authority for the current version. Feedback is most useful when it names the version, printer and material, fit, workflow conditions, observed failure, and whether the result could be repeated.
Before printing, check whether the linked hub actually contains the named product and whether its version matches the documentation you are reading. A profile link is a discovery destination, not proof that every concept or testing prototype on this site already has a downloadable file. Pages keep the unavailable state visible until a product-specific release destination exists.
Keep the original method available during testing. If a printed part does not fit, clean easily, survive the intended temperature, or make the workflow easier to explain, stop using it and record the failure before changing the model. Open-source iteration improves when unsuccessful conditions are documented as carefully as successful ones.
Competition legality is a separate check. Review the current event rules and confirm the exact printed version before adding any accessory to a competition kit.
Yes. The product-specific AeroTemper files and tested print profile are available on MakerWorld while hardware testing continues.
No. It prepares a paper filter inside an AeroPress filter cap. It does not compress a bed of coffee.
The holes distribute rinse water and reduce the continuous contact area between the wet paper and the tamper face. The intended workflow leaves the paper seated against the cap when the tamper is lifted.
Place the cap, one to three paper filters, and the tamper first. Add only a little hot water—roughly ten drops—then use light pressure and twist smoothly at least three times. Any excess can leave through the low-side cutout.
No. The tool is intended to make wetting, seating, and inspection more repeatable, but paper condition, cap fit, handling, and the printed surface still matter.
Compact setup, use, and cleaning instructions for AeroTemper.
Read the AeroTemper how-to guideThe AeroTemper whitepaper is in preparation; the whitepaper hub shows its current publication status.
Open AeroTemper whitepaper — coming soonDownload the product-specific AeroTemper files and tested print profile.
Open AeroTemper on MakerWorldHow Brew Supply separates measurable controls, workflow aids, and brewing decisions.
Read AeroPress precision tools guideA practical framework for choosing gear that earns its place in a competition setup.
Read AeroPress competition gear checklistHow hidden preparation and handling differences can weaken brew-to-brew comparisons.
Read Why AeroPress brews stop matching