Use Promo Codes to save $24 when you shop at Hydro Flask. Sign in to Hydro Flask, select the items you want to buy and add to your cart. Then, click Pay, select the corresponding available Coupons, and select your preferred payment method. Please note that each Hydro Flask Coupon Codes has its own rules of use, if your order is eligible for hydroflask.com, it can be used.