This glass tumbler boxed gift set of 4 tumblers are made from 100% recycled glass; you might see tiny air bubbles in the glass making them appear hand finished.
Buying this recycled glass is helping the environment - the energy saved in recycling glass 3 bottles is enough to:
> charge a smartphone battery for a year
> maintain a low consumption light bulb constantly lit for 9 days
> equivalent to the energy needed for 3 washing machine cycles