SIPA’s HotLight 38 neck finish for hot-fill bottles is a massive 10.6% lighter than a traditional neck finish. It has the same diameter – 38 mm – and the same height – 17.83 mm – but design changes made with pinpoint precision enable it to hit the scales at just 6.7 g, compared with 7.5 g. Bottle makers save material and cut running costs, while still being able to use the same closure and obtain the same performance from the bottle. Is it worth the investment in new tooling? No question about it: Yes! To change from the old to the new is a matter of replacing neck rings and nothing else. A converter using a 96-cavity mold to produce close to 250 million 22-gram preforms a year (typical for this size of mold), will be able to cut their consumption of PET by around 200 tonnes. With PET currently costing a little over €1/tonne, that works out at a saving of €210,000. The rings will pay for themselves in little more than three months. You might say: Change the rings and ring the changes!