At Eurobike, Elite, the Italian manufacturer of cages, water-bottles and home trainers, marked its foundation in 1979 with a black promotional bottle, inscribed with '30' in red.
The aluminium thermal bottle was given away to clients, customers and friends, explained Alessio Sartore, communications director at Elite. 4,000 pieces were made. None are for sale.
When two bottles are placed side by side the '30' makes the stylised shape of a bicycle.
The bottle also features two stylised industrial chimneys, a nod towards Elite's renovated factory, an old furnace.
"We're very proud of our factory," said Sartore. "It's a wonderful place to work."