"Leaks" star star star_border star_border star_border Not watertight, so I assume not airtight either. This container had a small amount of liquid in it and ended up on its side in the fridge. It leaked. Fine if you just want a pot with a lid but no good for travelling with (or if you have an untidy fridge!) Fiona Jones - 01 June 2021 support_agent A note from the team The containers are airtight and leak-proof so we're sorry you experienced this. It might be that the lid wasn't threaded on correctly, but please be assured that as with all our items its covered under the terms of the three year guarantee.