Kalita Wave 155 vs April Flat Bottom Paper

Fits

Kalita Wave 155

Flow

Unknown · Unknown

Material

Paper · Cellulose

Reuse

Single-use

Availability

In production

How it brews

The small (1-2 cup) Wave paper: a crinkled, flat-bottom cup that stands the coffee bed on three little contact points inside the Wave dripper, away from the walls. That geometry is the point — the flat bed and three small holes make the brew more forgiving of an uneven pour than a single-hole cone, which is why the Wave is a common recommendation for consistency. Where it sits on flow versus other flat papers isn't something Kalita rates and there's no reliable within-seat ranking, so we leave flow unrated rather than guess. The 155 fits any 155-class flat dripper (Kalita 155, and by cross-compat the smaller Stagg and Origami-S beds).

Fits

Flat basket, Kalita Wave 155, Kalita Wave 185

Flow

Fast · Manufacturer-stated

Material

Paper · Cellulose

Reuse

Single-use

Availability

Specialty only

How it brews

The Copenhagen roastery's own flat-bottom paper, sold Small (≈Kalita 155 / Origami S) and Large (size 175, for the April plastic brewer). It's cut to sit deep with a wide base and is marketed as flowing faster than conventional flat papers — that speed claim is April's, kept as a class rather than a number here. One honest ambiguity: older retailer copy described April filters as using Sibarist's abaca FAST technology, while the current listing says virgin wood pulp (cellulose); we record cellulose per the direct listing but don't treat abaca as confirmed. It drops into a Kalita Wave 155/185 seat, so it interchanges with those papers.