Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Hydro Flask Standard Mouth Flex Straw Cap by Hydro Flask Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $12.99 SKU 152528 Standard / Black - $12.99 Size Standard Color: Black Availability: Translation missing: en.general.icons.icon_check_circle icon 36 in stock 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Leakproof straw cap for Standard Mouth bottles.