Casalú makes a traditional rum seltzer infused with natural lime flavor and no artificial ingredients.

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Casalú reviews state the brand works as a distinctive, rum-based seltzer that consistently delivers refreshing, tropical flavor and evocative branding, though many reviewers note limited flavor variety and scarce retail availability. This makes Casalú a compelling buy for those seeking a crisp, Caribbean-rooted alternative to malt or vodka seltzers, but less ideal for shoppers who want multiple flavors or broad in-store access.

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