Save money and cut waste by bringing previous years’ fast fashion costumes and such accessories as hats, sunglasses, jewelry and so on to a costume swap on Thursday, October 25, from 6 to 7 p.m. EcoCycle is promoting this win-win event suitable for all ages. Refill Revolution, which specializes in bulk bath, body and home products and refillable containers, is hosting it at 3360 Arapahoe Ave., Boulder. Click here to RSVP.