The Vikings typically relied upon fresh water from streams to drink during the day. They were also known to drink buttermilk and weak ale. During times of feast, the Vikings would drink beer or mead, which is an alcoholic beverage made of honey.
The Vikings did not have a means to keep anything refrigerated, so anything left over from breakfast, such as buttermilk, had to be used before it soured. Often, this meant the Vikings turned what was left of their milk into cheese. Their drinks were usually consumed from horns, which were often decorated with elaborate knot-work patterns and rimmed with metal and pictures of mythological beasts.