SEPIA, TOPO or CAST: Choosing a 220-300ml Coffee Cup
By KINTO Japan | Published: 2026-11-01
Category: Comparisons
Compare SEPIA 270ml, TOPO 300ml and CAST 220ml on capacity, weight, material and care to pick the coffee cup that fits your routine.
Quick answer
Choose SEPIA 270ml if you want a light heat-resistant glass cup for milk-heavy drinks, TOPO 300ml if you prefer a heavier porcelain mug made in Japan, or CAST 220ml if you want the smallest, lightest glass cup for a focused single serving.
Capacity and weight change how the cup feels in use
The three cups sit close in volume but not in hand feel. SEPIA holds 270ml at about 120g, CAST holds 220ml at about 80g, and TOPO holds 300ml at about 280g. The glass options are light enough to lift with two fingers; the porcelain TOPO has a planted, substantial weight that some drinkers prefer for slow mornings.
A 50ml difference matters more with milk drinks than with black coffee. If you regularly make a latte or café au lait, the 270ml SEPIA and 300ml TOPO leave more room for milk and foam than the 220ml CAST. For a single espresso or a small filter coffee, the CAST 220ml keeps the portion focused.
Material and care decide where the cup lives
SEPIA and CAST are heat-resistant glass with a 120°C temperature differential, and both are microwave and dishwasher safe according to their care instructions. TOPO is porcelain, also microwave and dishwasher safe, and made in Japan. All three avoid abrasive cleansers and scourers.
Glass rewards you with visibility: you can watch the brew color and milk swirl, which suits layered drinks. Porcelain hides the contents but holds heat differently and feels more traditional. Neither material is automatically better; the trade-off is transparency and lightness versus heft and opacity.
Individual variation is part of the porcelain character
TOPO’s care notes state that size, weight and color can vary between individual pieces due to manufacturing lot and material characteristics, and that the logo may appear faint depending on glaze concentration. If you need identical cups for a matched set, that natural variation is a real consideration. The glass cups are not described with the same variability note in the supplied facts.
Trade-offs to weigh before you buy
- Capacity vs. portion control: SEPIA 270ml and TOPO 300ml give more room for milk and ice, while CAST 220ml keeps a small coffee from tasting diluted. Pick the larger sizes for lattes and the smaller one for espresso or strong filter coffee. Measure your usual pour before deciding; a 220ml cup fills quickly with a standard mug-sized brew.
- Lightness vs. heft: SEPIA at about 120g and CAST at about 80g are easy to lift and stack in a cupboard. TOPO at about 280g feels stable and warm in the hand but is noticeably heavier to carry.
- Visual clarity vs. traditional character: Glass shows the drink’s color and layers, which helps with milk drinks and iced coffee. Porcelain TOPO hides the contents and may show slight individual variation in size, weight, color or logo visibility. If you want a matched set, check that natural variation is acceptable before ordering multiple TOPO mugs.
- Care routine: All three are microwave and dishwasher safe, but none should be cleaned with abrasive cleansers or scourers. Glass cups should not be cooled suddenly or placed on wet surfaces while hot.
Product facts at a glance
- SEPIA カップ 270ml: 270ml heat-resistant glass cup, approximately 120g, microwave and dishwasher safe with a 120°C temperature differential. Light in the hand and easy to clean, it suits daily milk drinks where you want to see the layers.
SEPIA カップ 270ml - CAST コーヒーカップ 220ml: 220ml heat-resistant glass cup, approximately 80g, microwave and dishwasher safe with a 120°C temperature differential. The smallest and lightest option keeps a single serving focused and is simple to rinse and reuse.
CAST コーヒーカップ 220ml - TOPO マグ 300ml: 300ml porcelain mug, approximately 280g, made in Japan, microwave and dishwasher safe. The heaviest and largest cup gives a substantial feel and extra room for a long coffee.
Which cup fits your routine
Best for
- Drinkers who make 270ml lattes or café au lait and want to see the layers in glass
- Anyone who prefers a light cup that is easy to lift and clean daily
- Buyers who want a smaller 220ml portion for espresso or strong filter coffee
- Those who want a heavier, made-in-Japan porcelain mug for slow mornings
Not for
- People who need identical, matched cups and dislike natural variation in porcelain
- Drinkers who regularly make very large 350ml+ servings
- Anyone who wants a cup that keeps coffee hot for a long time without preheating
