Containers and method for manufacturing containers

A container, which includes:

• a body defining a reservoir;
• a portion of the body being provided by a first wall, the first wall being resiliently flexible and having a thickness of between 200 and 600 micrometer;
• and
• another portion of the body being provided by a second wall which is relatively more flexible than the first wall and having a thickness of between 10 and 100 micrometer;
• the first wall having a line of weakness, which is configured to open up to form an opening in the first wall when the first wall is folded about the line of weakness, the line of weakness being in the form of a continuous groove formation provided in the first wall;
• and
• the container being characterised in that the line of weakness is bent to define a V-shaped angle of between 178° and 90°, such that the first wall opens in a controlled fashion when folded about the line of weakness.