4 SodaStream Carbonating Bottles $32
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Get 2 twin packs of 1-Liter SodaStream Carbonating Bottles for $39.98 at HomeDepot.com. Then, add code GIFT4DAD at checkout to drop it again to $31.98. This gets you a total of four 1-liter bottles, which means each one only costs you $8. This is the best price we found anywhere (the next best is $10 each here). They're BPA free and reusable for up to 3 years. Spend $45 for free shipping, or ship to your local store for free. Sales tax is charged in most states.
Get an extra discount between $25-$1000 off any appliance purchase during checkout through 3/12 at Home Depot. This can save you over 15% off, and stacks on items already on sale! The discount varies with how much you spend (see here); for example, this Whirlpool 25cu.ft French Door Fridge with near-perfect reviews drops from $2199 to $1978 to $1778 or this Whirlpool Gold Top Control Dishwasher drops from $599 to $498 to $448 automatically during checkout, both the lowest price we found. Better yet, most items offer free delivery and haul away of your old appliance. Sales tax is charged in most states.