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TAYTHI via Amazon.com [amazon.com] has Cordless Water Flosser (Rechargeable IPX7 Waterproof) on sale for $ 20.99 with promotion code 8OGXHIMO.
Shipping is free w/ Prime or on orders over $ 35.
Cordless Water Flosser, Rechargeable IPX7 Waterproof, Amazon.com – $20.99