This one is THINKCHANCES brand on Amazon, but I've seen a few other brands that look the same.

THINKCHANCES Reusable Food Grade and BPA Free Silicone Round Sip Straw Coffee Juice Drinking Lid Kit with Stainless Steel Rings for Mason, Ball, Canning Jars, Pack of 4 Sets (Regular Mouth,Round Hole) https://www.amazon.com/dp/B07RYQC5LX/ref=cm_sw_r_apan_glt_fabc_556KRZB36WNGYEPZ2TA9?_encoding=UTF8&psc=1