A technical breakdown of the hot fill process for high-acid preserves. Covers the physics of vacuum formation, microbial control via 85°C thermal mass, and comparative sterilisation methods (Oven, Dishwasher, Water Bath) for BRCGS-compliant production.
Wholesale glass jam jars with lids are available from Jars & Bottles from as few as 3 units, with full pallet pricing at higher volumes. The most popular size for UK jam production is 251ml to 350ml with a 63mm twist-off lid. All jars are food grade, hot-fill rated to 85°C, and supplied with a Declaration of Compliance under UK-retained Regulation 1935/2004.
The best glass jar for small batch chutney in the UK is a 200g jar with a 63mm twist-off lid, available from single cases with no minimum order commitment. For farmers market and farm shop producers making under 5,000 jars per year, the 200g format gives the right price point for direct sales, while hexagonal and shaped profiles give better shelf presence than standard round jars without requiring high minimum quantities. This guide covers sizes, shapes, lid options, labelling, storage, and the volume threshold at which pallet ordering starts to make financial sense.
