Water bottles may have gone as far as they can go, according to SMI Pacifica's Steve Warren who recently brought back some samples from K-2007.
A minimalist PET bottle weighs just 8.8 grams yet holds 500ml of water.
"The flip cap is about the size of your thumbnail, but reseals beautifully," Warren reports.
"At the other end of the scale, is a sleek glass bottle with a wide screw cap. At 268 grams, it is 30 times heavier than the humble PET bottle and adds 50% to the gross weight.
SMI Pacifica supplies blow moulding, cartonising, shrink-wrapping and related packaging machinery to Australia, NZ and SE Asia.