I had been debating for several months whether I should change my packaging to this. Usually when I pour tarts I make several hundred at a time, and with less than 100 molds, it gets very time consuming having to pour, wait, unmold ,bag. label etc. I think going to this method would save me a TON of time. So when this thread came up I decided to go for it. I did some searching online and found polypropylene cups at www.suitesupply.com Their prices with shipping ended up being the cheapest for me. I just want to warn everyone that I had a horrible experience with them, and I wouldn't recommend them if you're considering this option. When I checked out, their cheapest shipping option would have taken over 2 weeks to get to me. So I paid for an upgraded shipping for them to get here faster. I was given an estimated arrival date. When that date came and went, I emailed them asking for tracking or shipping information and after getting a huge run around for several hours, I was informed that they hadn't even shipped them yet. There was NO communication from the company that there was a delay in shipping, no apology or explaination...nothing! I'd be much more understandable had I been notified, but the fact that I paid for a faster shipping and the items hadn't even been shipped after the date I was quoted for arrival was inexcusable to me. I cancelled the order but am still awaiting a refund. Just wanted to send out a warning to those that are thinking of doing it this way and buying from them.