Polish Design Season: designer Agnieszka Bar has created a range of bottles with collapsed bases.
The bottles are hand-made from glass.
Here's some test from Bar:
Borosilicone glass, cork
Elegant container for liquids: water, olive oil, vinegar.
The subtle bottle's line has deformed in the bottom part with high temperature. Object showed an essence of the glass matter. Handmade bottle from borosilicone glass.