BUNN Sure Immersion Cleaning Tablets help keep your Sure Immersion brewer in tip-top shape for perfect coffee every time. Simply open your brewer's panel door, place tablets in your machine's funnel, activate the cleaning cycle and let your brewer do the rest. When used according to instructions, cleaning tablets and self-cleaning machine function effectively cleans lines, brew box and all other areas liquid coffee runs through. Screw-top lid keeps tablets dry until use. Compatible with BUNN Sure Immersion bean-to-cup coffee brewers.