A stainless steel cup that collapses into a disc the size of a large coin and springs back into shape the moment you need a drink.
The rings nest tightly against one another as the cup opens, which is what lets it hold liquid rather than weeping at the seams. Food grade stainless steel means no plastic taste and nothing to absorb what you drank yesterday; it wipes out with a cloth when there is no sink within a mile.
Three sizes are made: 75 ml at 65 x 50 mm, 150 ml at 73 x 65 mm and 250 ml at 80 x 78 mm. It suits camping, hiking, tailgating and the glovebox, and it is a practical way to take medication away from home. One cup, in silver.
