Hydration on the go just got easier with our leakproof, insulated Flex Straw Cap. Add it to your favorite Standard Mouth Hydro Flask bottle to easily enjoy cold hydration anywhere. Standard Mouth Flex Straw Cap fits all Hydro Flask Standard Mouth Bottles.
The Hydro Flask Flex Straw Cap Standard is ideal for consumers who often travel with their beverages, requiring both insulation to keep liquids hot or cold and a sturdy straw for easy sipping, especially when using a reusable alternative.
