Materials for packaging

4.1. Glass

Advantages of glass packaging are their suitability for all kinds of foods as well as sterilized conserves (121^◦C) and pasteurized conserves (<100^◦C). Glass packaging gives the impression of a high quality product compared to plastic packaging. Another advantage is that glass containers are reusable (can be opened and closed whenever needed) and are recyclable.

The major disadvantages of glass is its breakability and its heavy weight, which both are a cost factor in transport. Glass is also see-through and does provide only limited UV-protection, which can cause discoloration or oxidation/rancidity of the product (e.g. unsaturated oils, like rapeseed oil, pumpkin seed oil, etc.). Higher UV-protection can be achieved by using colored glass (usually green or brown). These are often used for unsaturated oils, dairy products or other beverages.