# Liquids over 1 litre · Royal Mail / Post Office — Mailing and air-carriage restrictions by item category

For Liquids over 1 litre · Royal Mail / Post Office, item category is Liquids over 1 litre; carrier is Royal Mail / Post Office; restriction type is restricted; scope is UK only (international mail prohibited); conditions is Items must be securely closed and placed in a leak-proof inner liner, such as a sealed polythene bag, and in a leak-proof outer Mark as "FRAGILE" when sending glass bottles Customers posting via Parcelforce Worldwide, maximum 5 litres per container, must be sent using express48, recorded from its source on 2026-08-30.

- **Item category:** Liquids over 1 litre _(verified: appears in the quote below)_
- **Carrier:** Royal Mail / Post Office _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** UK only (international mail prohibited) _(our reading, not quoted from the source)_
- **Conditions:** Items must be securely closed and placed in a leak-proof inner liner, such as a sealed polythene bag, and in a leak-proof outer Mark as "FRAGILE" when sending glass bottles Customers posting via Parcelforce Worldwide, maximum 5 litres per container, must be sent using express48 _(verified: appears in the quote below)_

## What the source says

> Liquids not classified as dangerous goods Liquids over 1 litre International – not allowed in the mail UK – allowed in the mail, see restrictions and packaging guidelines below: Items must be securely closed and placed in a leak-proof inner liner, such as a sealed polythene bag, and in a leak-proof outer Mark as "FRAGILE" when sending glass bottles Customers posting via Parcelforce Worldwide, maximum 5 litres per container, must be sent using express48

## Source

- https://www.postoffice.co.uk/mail/what-can-i-send

Last verified: 2026-08-30. Review by: 2027-08-30.
Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).