If containers need to be labeled, three main methods are employed:
1. Lettering is engraved into one or two sides of the container, representing a name abbreviation and/or number. This is a permanent form of labelling. The lettering is coloured in with a felt-tip pen. This is the most economical and simplest method.
2. Silk screen printing on one or two sides, lettering or logo. The option of one colour is offered. Running serial numbers must be milled. Silk screen can withstand washing with water if a very stiff brush is not used.
3. Mould-in graphics. Lettering and logo. The customer can choose from two to three colours. Running serial numbers must be milled. This is a more permanent method than silk screen, but more expensive, especially on a small scale.