If you’re on Oahu and you go shopping – bring your own bag or pay $0.15 (as of 2019) per bag used. We call it the “Bag Tax” and right now I’m going against my strong urges to go on a rant about why this either is a good idea or a terrible idea (see? we’re just not going into politics here!) and instead just tell you how I deal with it: I’ll usually bring a bag when I go grocery shopping and use that as my “shopping cart” because I typically run in for a few items. The big shopping days for me are at Costco and they don’t even make bags available. What’s awkward for me is when I go to the mall to pickup non-grocery items – I keep forgetting to bring my bag and there, I just hand-carry the items out which can get cumbersome. Whatever you decide, read Aina’s article about it and you’ll have a much better understanding and be better prepared.
Shopping on Oahu and the Bag Tax

Green SeaTurtle - Maui, Hawaiian Islands by LASZLO ILYES is licensed under CC BY 2.0. Image may have been resized or cropped from original
Even the honus (turtles) don't like daylight savings time. Green SeaTurtle - Maui, Hawaiian Islands by LASZLO ILYES is licensed under CC BY 2.0. Image may have been resized or cropped from original