Sodastream Jet Home Soda Maker (Black) or Red for $38.99 after coupon code GIFT4DAD and this $25 rebate.  Here is a screenshot before the $25 rebate for your reference. It features a battery-free, hand-pump design, integrated carbonation chamber, reusable carbonator bottle, and 1-liter capacity.  Most places have this soda maker for about $79.