AnkerDirect via Amazon offers a 60W GaN USB-C Power Delivery Charger for $34.99 when you clip the on-page coupon. This is down from its regular rate of $42 and beats our last mention as well as the previous all-time low. The official 61W USB-C charger from Apple is $65 at Amazon for comparison.
With the power to recharge just about any MacBook, Air, or Pro, this portable 60W wall adapter is part of the laptop bag of any Apple user. There are very few reviews, but the products of Anker are generally well-rated.
Take the Anker Powerline II USB-C cable to USB-C at $13 with your savings. This cable is capable of handling just about anything that you powerfully throw at it. Plus, the black design fits perfectly with the charger above.