Manufactured to European standards (food safety) (quality assurance) (packaging) (consistency of supply) (social responsibility). Unbreakable and the crystal clear transparency makes it almost impossible to distinguish it from glass. The insulating properties are even greater than glass so drinks stay hot or cold for longer. Ideal for outdoor events such as for BBQs, picnics, camping, caravanning, boating and around swimming pools addition these glasses are reusable, can be recycled, are environmentally friendly and can be put in a dishwasher or microwave. Child-friendly and suitable for use by the elderly and infirm.