This is an extract from Why Shrink-Wrap a Cucumber? The complete guide to environmental packaging by Laurel Miller & Stephen Aldridge 

The classic Contour glass bottle most people associate with Coke has had a chequered recent history. It was briefly replaced by a straight-sided bottle in the 1970s, and later came under threat from cheaper and lighter PET bottles – so there was a good reason to design a more lightweight glass bottle. The Ultra is 20 per cent lighter than the Contour, 40 per cent stronger and 10 per cent cheaper to produce. Although it is slightly dumpier than the original it retains much of its spirit, and even emphasises the curves that have always made the bottle so distinctive.

Even though i dont know what ‘dumpier’ means, this shows how improvements to the material of the bottle can have improvements to the manufacture, distribution, use and overal economy of the product. It is this type of glass that i would want to use for my Lea & Perrins design, because, for similar reasons as Coca-Cola, the brand is very old and traditional, and the materials it is packaged in make a difference to the look and feel of the product. Though Coca-Cola now comes in many different packages, they still manufacture the glass bottles, almost as a salute to the heritage of the product.