The worst sound in the world is a shampoo bottle fart. As someone obsessed with getting the last few drops of product out of the bottle, I rue the day I squeeze it and get only fractional globs and noise; I know there's still three dosages lining the bottle walls, but extracting them will be more difficult than hydraulic fracturing.
Italian cosmetic packaging company Lumson has developed a bottle design that does a better job of evacuating product. Called the TAG (Techno Airless Glass) bottle system, it consists of a glass bottle, a plastic pump and a collapsible pouch. The product, which is loaded into the collapsible pouch, never touches the walls of the glass; and because the pouch is airtight, after being fully dispensed there is "almost no product residue" remaining in the pouch. The bottle's components can also be separated completely at a recycling facility, leaving behind clean glass and plastic ready for round two.
Here's how it works:
Lumson's design uses glass since they're a cosmetics packaging company, but it would be nice to see them adapt their system for use with plastic bottles and non-cosmetic products. In addition to letting us get to the last drop, the TAG system would save us consumers from having to use all the gallons of water we use rinsing out various bottles prior to recycling.