It’s a shame the AHA doesn’t have a means in place to get a discount for homebrew competitions to get standardized cups. We use Comet/Sweetheart T7T and have an online supplier which offers the best price we have found, but it still is not inexpensive.
I know at one time the AHA had medals available, why not cups?
We used the corn starch cups at a couple of recent sessions and found them to work well, plus they are recyclable. I know that I’d heard of a problem with head retention before, but we had no issues with that.
Perhaps if the order is big enough they would become less expensive.