Freezing and Defrosting Glasses: You Need to Know That

Freeze plastic-free in jars

The main thing to remember when freezing jars is that the volume of the contents increases.

• Use thick-walled glasses with a large opening. Thin or tall glasses are less suitable for freezing. Also, make sure that the glass does not get narrower towards the top. Old jam or olive jars work well!
• Especially with liquids: Only fill the glasses two-thirds full. This leaves enough space for the content to expand.
• Always store glasses upright in the freezer.
• Place the screw caps of the jars loosely on top and only close them airtight as soon as the contents have frozen.
• To be on the safe side, let the filled glasses cool down in the fridge before you put them in the freezer. This reduces the risk of bursting.

Defrost food in screw-top jars

Patience is required when defrosting filled screw-top jars.

• Slowly thaw the frozen jars. Either at room temperature or even better in the fridge.
• Never put frozen jars in hot water to speed up defrosting. Defrosting in the microwave is also not a good idea. Glass cracks when exposed to large temperature differences.