Beverage bottler Coca-Cola Europacific Partners (CCEP) and Milk & More, a milk delivery company that uses glass bottles, have announced a trial partnership to deliver Coca-Cola Zero in reusable glass containers.

Starting June 5th, the trial will occur in South London and central southern England and last eight to twelve weeks while supplies last. Like the brand’s glass milk bottles, Milk & More customers can purchase the 1-liter Coke Zero Sugar bottles, enjoy them, then leave the empties on their doorstep for pickup. The new containers can get refilled up to twenty times and are expected to have an 82% smaller carbon footprint than single-use glass bottles.

Additionally, Milk & More further reduces the carbon footprint by using electric vehicles for delivery.