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Mouthwash
Price per fluid ounce across bottle sizes.
The cheapest mouthwash right now is Amazon Basics Multi Action Antiseptic Oral Rinse, Alcohol-Free, Antiplaque, Antigingivitis, Fresh Mint Flavor, 1 Liter (33.8 Fluid Ounces), 1-Pack (Previously Solimo) at $0.131 / fl oz — 9 product lines compared, ranked by real price per fl oz.
💲 Prices and availability verified Oct 30, 2026, not live-updated yet — accurate as of that date and subject to change. Check the retailer for the current price before buying.
Price
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9 of 9 product lines · sorted by best price per unit
Best value
Amazon Basics
Amazon Basics Multi Action Antiseptic Oral Rinse, Alcohol-Free, Antiplaque, Antigingivitis, Fresh Mint Flavor, 1 Liter (33.8 Fluid Ounces), 1-Pack (Previously Solimo)
$0.131 / fl oz
$4.44 total · 1 size
Amazon Basics
Amazon Basics Anticavity Fluoride Rinse, Alcohol-Free, Mint, 18 Ounce (Pack of 4), Packaging May Vary
$0.133 / fl oz
$9.59 total · 1 size
Crest
Crest Scope Outlast Mouthwash, Long Lasting Peppermint, 1 L (SG_B019FGCOW6_US)
$0.138 / fl oz
$4.67 total · 1 size
Amazon Basics
Amazon Basics Fresh Breath Mouthwash for Bad Breath, Refreshing Mint, Clean Taste, 33.8 fl oz (Previously Solimo)
$0.142 / fl oz
$4.80 total · 2 sizes
Amazon Basics
Amazon Basics Teeth Whitening Mouthwash, Alcohol-Free, Clean Mint Flavor, Breath Freshener, 32 fl oz, 4-Pack (Previously Solimo)
$0.143 / fl oz
$18.24 total · 1 size
Amazon Basics
Amazon Basics Fluoride Mouthwash for Adults, Anticavity, Alcohol Free, Bad Breath Control, Strengthens Teeth - Refreshing Mint Flavor, 1 Liter
$0.146 / fl oz
$4.92 total · 1 size
Listerine
Listerine Cool Mint Antiseptic Mouthwash, Intense Mint, 50.7 fl. oz/1.5 L
$0.157 / fl oz
$7.98 total · 1 size
Crest
Crest Mouthwash Pro Health Multi-Protection, 1L, 2 Pack, 6-in-1 Benefits, Alcohol Free, Enamel Repair, Breath Freshener, Anti Cavity, Fluoride mouthwash, Bad Breath Treatment for Adults, Contains CPC
$0.162 / fl oz
$10.97 total · 1 size
Listerine
Listerine Original Antiseptic Mouthwash, Intense Taste, 33.8 fl. oz/1L x 2 | Kills 99.9% of Germs That Cause Bad Breath, Plaque and Gingivitis, ADA-Accepted, Original Flavored Oral Rinse
$0.162 / fl oz
$10.98 total · 1 size
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