Bestbuy offers Anker Nano II 45W USB-C GaN Wall Charger for $20 (reg $28) with free shipping.

Product Description:
Anker Nano II PD is a 45W USB-C charger that you can use on your phone and USB-C laptop alike. With Power Delivery charging technology, you can charge your iPhone and iPad 3 times faster than their in-box chargers. Nano II PD contains Gan II technology, which allows us to make this model even smaller than before due to better heat dissipation.

• Designed for iPhone and iPad
  Charges iPhone and iPad up to 3 times faster than their in-the-box chargers.
• Super Fast for Samsung
  Supports Samsung’s Super Fast Charging technology for the latest flagship phones.
• Laptop Charging
  Can charge Macbook Air, Dell XPS, Surface, Pixelbook, and more laptop models at up to 45W charging speeds.
• Space-Saving Design and Plug
  Anker Nano II 45W is seriously compact; measuring 34% smaller than Samsung’s 45W Charger— and also comes with a foldable plug.
• Gan II-Powered
  Gan II technology increases the working frequency of GaN by 20%, allowing Nano II to generate even less heat than its predecessor— allowing us to to make Nano smaller than ever before.