Challenges celebrate personal achievements and unique experiences, and have become a popular way for people to stay engaged, set goals and keep the parkrun experience fresh week after week. Use the parkrun app to track your challenge progress, compare challenge achievements with friends and work towards your next goal. Attend a parkrun starting with every letter mentioned in the Old MacDonald song. Our triple walled, personalised, stainless steel 500ml bottles keep your drink cold for up to 24 hours. Please note: Personalised products are excluded from our 30 day return policy; therefore, please ensure all details are correct prior to submitting your order.