Amazon is currently selling a two-pack of the Anker PowerPort Mini's, which are dual-port wall chargers that do 12W. This is a great deal to take advantage of since these are pretty small and can fit in your travel bag quite nicely, and at about $6.50 each, this is definitely a great deal to take advantage of.
The Anker PowerPort Mini is a dual-port wall charger, which has a foldable plug, allowing you to toss these into your bag pretty easily, and not even need to worry about the plug getting bent or damaged. These come in white only, which seems to be Anker's new color of choice, since the majority of its new products are white these days. Now with these being so small, they don't actually support Qualcomm's Quick Charge 3.0 here, instead, it supports Anker's Power IQ 2.0, which is basically a proprietary technology that Anker uses to allow the charger to talk to your phone and see how fast it can charge. So you're going to get max speeds of around 2.4A (about Quick Charge 2.0 speed), which is still plenty fast, but best of all, it's not going to damage your smartphone. Whether it supports fast charging or not, which is definitely a good thing these days. It's backwards compatible too, so if your phone can only do 2A, it will do 2A.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $119/year (or $59/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.