method
How Lid Ledger works
The sources, assumptions and limits behind this independent planning tool.
A documented lookup
The current catalog contains 12 exact container-code records across Pyrex and Snapware. Search checks the full code, including letters. For each record, the manufacturer’s own replacement page is the source. We do not infer a seal from a photograph, capacity, measured diameter or a similar code.
Your list
The shopping list stores a record identifier and quantity in this browser. No payment or ordering takes place here. Printing and copying give you a way to compare the same list with more than one seller.
How we maintain the reference
Published product facts link to their source and carry a review date. They are documented specifications, not hands-on test results. Retailer stock, shipping and prices can change. A planning result should be checked against the exact product and its current instructions before a purchase.
Independence
This site is not operated or endorsed by the product manufacturers named here. Brand names identify the products being discussed. We do not accept payment to change a calculation or label an unverified match as confirmed.
Publisher
FollowThroughCS