+ -

The 1.5 liter water bottle is formed into the shape of a concertina tube, which can be varied to the users’ amount of water left. Making more space in the bag as well as decreasing shipping costs.

The initial concept was brought in the background of Melbourne for my exchange student period. I found it common in Australia, people enjoy taking out 1.5 water bottles with them as well as smaller ones hence the large size of it.

PlusMinus aims to reduce the requirement for large space in the shipping process, making economical benefits to the industry.Making the form slightly smaller, the plastic is equivallent to the amount of plastic used in the original 1.5 liter bottle.
The mathematic symbol refers to the shape of the water bottle, ‘+’ for the water bottle when it is full, ‘-’ for when it is used and pressed upon. Having a strong identity from the form, the logo is placed on the bottle cap - reducing excessive packaging for the environment.

Fully retracted when the water is finished, the bottle leads the user to take it home with them and recycle.