Place cucumber slices in a large bowl or pack in mason jars.
Heat water, vinegar salt, sugar, red pepper flakes, garlic, black peppercorns, mustard seeds, and dill in a large pot over high heat until salt has dissolved and the mixture is simmering. Immediately pour brine over the cucumbers, making sure they are submerged in the brine. Let cool for 30 minutes. Cover the bowl or jars, and refrigerate until thoroughly chilled. Store for up to a month.
Recipe by My Lilikoi Kitchen at https://www.mylilikoikitchen.com/2022/05/28/quick-dill-pickle-chips/