Hellobee Boards

Not sure which height you have, it there are a bunch of options on Amazon, here’s one:

6 PCS(2 Straws+2 Cleaning Brushes) for Thermos Replacement Straws with 2 Stems, for Thermos Funtainer 12 Ounce Bottle F401(with a carry loop), Drinking Straws Set with Cleaning Brushes https://www.amazon.com/dp/B077PS65W2/ref=cm_sw_r_cp_api_ISvVBb2ZGVT61