P-38 Can Opener

The P-38 (and its larger sibling the P-51) enjoy near-universal praise from the r/BuyItForLife community as one of the most durable, affordable, and reliable tools ever made. Users routinely report using the same opener for decades — some inherited from grandparents or brought back from Vietnam — with no signs of failure. The main caveat is ergonomics: the small size can be hard on fingers, especially for extended use.

At under a dollar with a documented lifespan of 50+ years and no mechanical parts to fail, the P-38 is one of the clearest examples of buy-it-for-life value in any category — the only meaningful trade-off is ergonomic comfort during extended use.

The community consistently highlights the P-38's extreme longevity, negligible cost, and mechanical simplicity as the core reasons it earns BIFL status. Many users treat it as a benchmark against which all other can openers are measured.

• Individual openers routinely last 40–50+ years with regular use
• Costs under a dollar, often sold in multipacks for ~$5
• No moving parts means virtually nothing to break or wear out
• Small enough to live on a keychain indefinitely
• Doubles as a screwdriver and general-purpose multi-tool
• P-51 variant offers more leverage and easier use than the P-38

The primary criticism is ergonomic: the P-38's small size is hard on fingers, particularly for opening multiple cans in a row. A small number of users also note it requires a learning curve before use becomes fast or comfortable.

• Small size is tough on fingers, especially for multiple cans
• Requires practice before it becomes quick and intuitive
• Not suitable as an everyday replacement if you open many cans
• Some users with arthritis find the P-51 painful to use

One user still has their grandfather's P-38 from World War II — he used it almost daily as a letter opener from 1945 to 2002, and it opens cans just as well as brand-new ones from an army surplus store.

A former professional cook kept a P-38 in their knife kit because every other can opener eventually failed — they lost count of how many times they saved the kitchen with it while everyone else watched in disbelief.

After his wife broke multiple can openers including a great-grandmother's heirloom, one user switched to a P-38 seventeen years ago and says he'll never go back.

Someone who worked as a chef, home cook, and culinary instructor noted that even expensive counter-mounted industrial openers eventually go out of alignment, implying that simpler designs like the P-38 outlast far more elaborate alternatives.