Specifications
| Materials | Handcrafted Glass |
| Diameter | 3.3 in / 8.3 cm |
| Height | 3.3 in / 8.5 cm |
| Capacity | 8.1 fl oz / 240 ml Kohaku Yarai Glass |
| Care Instructions | Do Not put in oven or under direct fire/heat May crack when subject to extreme temperature differential Hand clean with soft cloth and mild chemicals only Item is fragile, avoid dropping |
| Styles | Kohaku Kagome Glass | Kohaku Kiku Glass | Kohaku Yarai Glass | Kohaku Nanako Glass | Set Of Four |
Toyo-Sasaki Kohaku Hand-Cut Crystal Glass Collection
$226 – $890
The Toyo-Sasaki Kohaku Hand-Cut Crystal Glass Collection brings together warm amber-toned crystal with refined cut-glass detailing, creating a piece that feels elegant.
Description
The Toyo-Sasaki Kohaku Kiriko Glass Collection brings together warm amber-toned glass with refined cut-glass detailing, creating a piece that feels elegant.
Materials: Handcrafted Glass
Diameter: 3.3 in / 8.3 cm
Height: 3.3 in / 8.5 cm
Capacity: 8.1 fl oz / 240 ml Kohaku Yarai Glass
Care Instructions: Do Not put in oven or under direct fire/heat May crack when subject to extreme temperature differential Hand clean with soft cloth and mild chemicals only Item is fragile, avoid dropping
The Craft, in Four Steps
Design Drafting
Each pattern is drawn by hand, mapping how light will travel through every facet.
Initial Cutting
Diamond wheels carve the primary facets. One wrong angle and the piece is lost.
Fine Adjustment
Each facet is refined by hand. Depth, edge, angle - adjusted until geometry becomes art.
Final Polishing
Progressive abrasives bring out optical clarity. Light passes through without distortion.
Why Optical-Grade Crystal?
Our crystal isn't just "glass." It's optical-grade borosilicate - the same material used in telescope lenses and camera prisms, chosen for its extraordinary clarity and precision.
When we set out to make the perfect whiskey glass, we didn't start with tradition. We started with a question: What if the same crystal that helps us see the stars could hold the amber glow of your favorite whiskey?
The result is a glass with >92% light transmission - higher than traditional lead crystal - and a hardness that allows for incredibly precise hand-cut facets. It's lighter than lead crystal, yet more durable and chemically stable.
This isn't a cheaper alternative to crystal. It's a better one.
| Attribute | Optical Crystal (ours) | Lead Crystal | Ordinary Glass |
|---|---|---|---|
| Light Transmission | >92% | >90% | ~85% |
| Refractive Index | High | High | Low |
| Lead Content | Lead-free | 24%+ | 0% |
| Weight | Lighter | Heavier | Light |
| Cut Precision | Excellent | Good | Poor |
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