4-Tubes Nuun Hydration Electrolyte Drink Tablets (40 Servings, Citrus/Berry) $15.89

Amazon has Nuun Hydration Drink Tablet Tubes on sale for $15.89 when you ‘clip’ the 15% off coupon on the product page and check out via Subscribe & Save. Shipping is free with Prime or on orders of $25 or more.
https://www.amazon.com/dp/B019GU4…20INT&th=1