Disclosure: If you make a purchase through the links posted below, I may receive a small compensation. Read the full disclosure.
I’ve never seen a straw topper advent calendar until I came across this one and I couldn’t add it to my cart fast enough! Amazon has a Christmas Themed Straw Topper Advent Calendar. The 24 Days of Surprises with 10mm Straw Toppers Advent Calendar is $16.99, but currently has a coupon you can clip for 30% off, making it just $11.89!
It includes the following straw toppers (which will fit your 30oz and 40oz Stanley tumbler straws):
