Air-Sealed Ceramic Butter Jar

Measurements: 9.8 cm × 9.8 cm × 7.6 cm. Made from premium ceramic body with uniform wall thickness (approx. 8 mm) and high-gloss food-safe glaze — fired to >1200°C for hardness, chip resistance and thermal inertia. No plastic components or coatings. The lid engages with three precise alignment ribs and a tapered sealing rim — achieving passive vacuum effect upon closure. Wide mouth (7.2 cm internal diameter) permits full-hand access for packing and cleaning. Base incorporates concentric micro-ridges for directional grip — tested on wet laminate, oiled wood and stainless steel surfaces. Developed for UK usage patterns: retains optimal butter texture between 15–21°C — ideal for British kitchens where central heating fluctuates seasonally. Functions equally well for continental-style cultured butters or UK-sourced clotted variants — accommodating both firm and creamy consistencies without leakage or lid blow-off.