We’ve been using the same one we bought in May. We’ve used it for three more trips (September, October, and December) and never had a cast member say anything, or even bat an eye when we ask for a refill. I have noticed quite an assortment of different colored non-souvenir buckets around the park (being carried by guests and even different colored buckets for sale at various locations) so I’m guessing it isn’t an issue since all these people are bringing in all different buckets.
BTW-Lisa, I love your dining reports and can’t wait to hear about your next visit!