For a limited time, the retailer has rolled back the price on the Ninja Thirsti Drink Maker from $169 to $99 with free shipping. When you purchase the Ninja Thirsti Drink System, it comes with a Thirsti Station, 48 oz. Ninja Thirsti $169 $99 Ninja Thirsti Drink System $99 on WalmartIf you’re a calorie or sugar counter, these creations will feel guilt-free. Not only will you save $70 if you buy the Ninja Thirsti Drink System today, but you’ll also cut back on your drink bill when you go out. Ninja often marks down different items in its product lineup at Walmart, so it could be awhile before another discount rolls around on the Ninja Thirsti Drink System.