Like to get free samples no strings attached? Click here to get your printable coupon for a FREE 20 oz. bottle of Polar Seltzer at your participating Xtramart Convenience Stores. Polar Seltzer water is a healthy alternative to soda and fruit drinks (which contain tons of sugar or high fructose corn syrup). With NO calories, sodium, caffeine, sugar, or carbs, why choose anything else? Run out and get Polar Seltzer for your next party or get together. Limit one per customer. This offer only lasts until the 18th or until supplies run out.