Some of the "compatible" replacement tips receive reviews of not fitting, being difficult to remove and/or twisting in the WaterPik. In my case at least, they come in and out easily, stay in place during use, and seem to do the same job as name brand parts.
The Legend of Zelda: Breath of the Wild game for Nintendo Switch, cartridge
20 Review
Convenient Listerine Ready! Tabs Whitening Chewable Tablets: Polar Mint Flavor to π¦· Combat Bad Breath, Whiten Teeth, and Eliminate Germs Anywhere, 24 ct, Sugar-Free, Gluten-Free
11 Review
BLIS Fresh Breath Kit: Potent BLIS K12 Oral Probiotic for Bad Breath & Halitosis Treatment - Clinically Proven Mouthwash, Tongue Scraper, Lozenges - 4 Week Supply
11 Review
π¦· Colgate Max Fresh Whitening Toothpaste with Breath Strips, Clean Mint, Limited Edition - 6 Oz, 24 Ounce (Pack of 4)
10 Review