5 August 2025 onwards: KOI Thé Singapore, Free Upsize Red Bean Purple Rice Milk Tea for Members Promotion by JR 5/Aug/2025 KOI Thé Singapore is offering KOI members a free upsize voucher for Red Bean Purple Rice Milk Tea starting 5 August 2025. Learn how to join their membership and enjoy this exclusive deal across most outlets in Singapore. Read more
