The naturally flavoured, sugar free water range is the key brand of the club’s new hydration partner, the locally-based CBL Drinks.
The partnership comes a week before Durham host the second Investec Test Match, which will see England face Sri Lanka.
The volunteers will wear their new shirts throughout the Test, branded with the Perfectly Clear logo.
Martin Thornton, Chairman of CBL Drinks, said: “We are thrilled to expand our connection with this fantastic cricket club. The volunteers do great work and we are proud to sponsor them. This is also a great opportunity for our company, since the partnership will further increase awareness of Perfectly Clear across the UK.”
Tom Seymour, Sales Director at Durham County Cricket Club said: “We are very pleased to develop our partnership with CBL Drinks, since their support so far has been amazing. The sponsorship of our volunteers is the perfect next step. The new Perfectly Clear shirts look terrific, and the Test provides the perfect opportunity to show them off.”
The second Investec Test match starts on Friday, May 27 at the Emirates Riverside.