Waterdrop Refrigerator Water Filter Replacements (3-4 Pack) for GE, Whirlpool, Maytag, or Samsung from $21

Ecolife Technologies via Amazon is offering Waterdrop Refrigerator Water Filter Replacements (3-4 Pack) for GE, Whirlpool, Maytag, or Samsung on sale from $21. Shipping is free with prime.
3-Pack:
$24.09 – GE MWF SmartWater, MWFA, MWFP, GWF, GWFA, Kenmore 9991
Link
Promo code: 27UC1S6W
$21 – Whirlpool 4396701,4396702, EDR6D1
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Promo code: 30X8PN9D
$27.99 – Maytag UKF8001, UKF8001AXX, UKF8001P, EDR4RXD1, Whirlpool 4396395
Link
Promo code: 306IPR67
4-Pack:
$25.60 – GE MSWF 101820A
Link
Promo code: 20RWFLHA
$27.20 – Samsung DA29-00003G, DA29-00003B, DA29-00003A, HAFCU1
Link
Promo code: 20RWFLHA