Note: I don’t know if this has a hechsher, the CRC says here it doesn’t need, but I would ask a rav if you have any questions https://consumer.crckosher.org/faqs/crockpot-liners/

Amazon has the Glad Slow Cooker and Crockpot Liners, 13 x 21 In, 10 Count marked down to only $5.47, use “Subscribe & Save” to get free shipping and bring the price down to only $5.20 (was $9.29)

If you have 5 or more “Subscribe & Save” subscriptions a month you will save 10% instead of 5% and your total will be only $5.02 + Free shipping!

• FAST & EASY MESS-FREE CLEAN-UP AFTER EVERY MEAL: Glad Slow Cooker Liners prevent food from sticking to the insert, eliminating the need to scrub stuck-on residue. Simply lift out the liner after cooking and discard for a spotless slow cooker.
• FITS 3-8 QUART SLOW COOKERS AND CROCKPOTS: Designed to fit round and oval slow cookers and crockpots from 3 to 8 quarts, including most major brands. Check your model’s quart capacity before ordering to ensure proper fit.
• BPA-FREE FORMULA — FOOD CONTACT SAFE: These liners are formulated without bisphenol-A (BPA). Made from food-contact-safe materials so you can cook with confidence. Safe for use with soups, stews, roasts, casseroles, and slow-cooked dishes.
• GENEROUS 13″ x 21″ SIZE FOR AMPLE COVERAGE: Each liner measures 13 inches by 21 inches, providing generous coverage up the sides of your slow cooker insert. The large size accommodates full-capacity cooking without bunching at the bottom.
• 10 LINERS PER BOX — MULTIPLE WEEKS OF SLOW COOKING: Each box includes 10 disposable liners, enough for multiple weeks of regular slow cooking. Open the box, drop in a liner, add your ingredients, and enjoy — clean-up takes seconds.

Glad Slow Cooker and Crockpot Liners, 13 x 21 In, 10 Count

After your order processes you can to go to “Your Account” and click on “Manage Subscribe & Save” to cancel any future shipments