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I just got this in the mail and it fits my 21 oz standard mouth hydroflask perfectly! I just needed to cut a tiny bit off the straw so it fit. Very pleased with my purchase and way cheaper than buying it from Hydroflask directly!

UPDATE: I had a minor issue with the cap and contacted customer service and they literally responded within a few minutes and resolved my issue. Best customer service experience I have had in a LONG time!

Review by Sandra B. on February 2, 2016

May 22, 2016 — Shopify API