I bought 75 blank koozies from Amazon and my sister will be putting the design on them. For anyone who did koozies, how did they work out for you? Did you feel it was a waste? We are having about 75 guests and I'm wondering if I should save myself $15 and return 25 of the koozies because I'm worried I'll have a lot left over or something. Were they well received for you? Editttted a typo