**SAVE OVER $20: **As of March 26, the Hydro Flask Travel Tumbler is on sale for $17.98 at Amazon. That's a 55% discount on the list price.

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Credit: Hydro Flask

Hydro Flask Travel Tumbler

$17.98

at Amazon

$39.95

Save $21.97

Get Deal

Amazon's Big Spring Sale is well underway and discounts have been kicking off on everything from robot vacuums to everyday essential products. Popular items like the Hydro Flask Travel Tumbler are also on sale, and if color doesn't matter to you all too much, you can get one for its best-ever price.

As of March 26, the Travel Tumbler in the color cascade is reduced to $17.98, a saving of over $20.…