the plastic-|||-vhich had been used for bottles since-|||-he 1960s,suitable for drinks with gas in them.A new plastic had-|||-o be made.-|||-Glass Is still cheaper for the smaller bottles, and will continue-|||-o be so upless oll and plastic become-|||-nuch cheaper, but plastic does well for the larger sizes.-|||-Polyester bottles are virtually unbreakable.The nanufacturers-|||-laim they are also lighter,less noisy-|||-when being handled,and can be reused. Shopkeepers and other-|||-usiness people are unlikely to object-|||-o a change from glass to polyester,since these bottles mean few-|||-reakages, which are costly and-|||-ime-consumlng.The public,though, have been more difficult to-|||-ersuade. ICI`s commercial department-|||-s developing different bottles with interesting shapes,to try and-|||-nake them visually more attractive to-|||-he public.-|||-The next step could be to develop a plastic which could-|||-eplace tins for food.The problem here is-|||-he high temperatures necessary for cooking the food in the-|||-ontainer.-|||-Plastics of various kinds have been used for making-|||-ottles __ →-|||-.since the 1970s but only for large bottles-|||-.since the 1960s but not for liquids with gas in them-|||-).since companies like Coca Cola first tried them-|||-.since 1982-|||-.Why is ICl`s Plastics Division interested in polyester for bottles?-|||-.The other things they make are not selling well.-|||-.Glass manufact cturers cannot make enough new bottles.-|||-.They have factories which could be adapted to make it.-|||-).The price of oil keeps changing.-|||-.Manufacturers think polyester bottles are better than glass-|||-ottles because they __ _,-|||-.are cheaper-|||-.are more suited to small sizes-|||-.are more exciting to look at-|||-).do not break easily-|||-.Plastic containers for holding food in the same way as-|||-ans. __ .-|||-.have been used for many years-|||-.are an idea that interests the plastics companies-|||-.are possible,but only for hot food-|||-.are the first things being made in the new factories