I only drink milkshakes through a straw if buying one. If I make one myself, I’m perfectly happy chugging it without the straw. Ditto everything else that regularly comes with straws.
I can assure you that iced tea tastes better through a straw.
As long as it’s not one of those God-awful paper straws that make everything taste like cardboard and make me want to punch a baby seal.
I’m looking forward to learn how you are testing that blind.
FWIW I chew the ice when drinking any beverage containing it. Creating a mini-slush in my mouth