We don't always have a box cutter or a pair of scissors on hand ... than a roughly two-inch keychain accessory that can measure up to 10 feet. Milwaukee's 10 ft. Keychain Tape Measure offers ...

The good news is keychain tools exist ... Multi-tool — which is priced at $20 on Amazon to date — is easily a box cutter, bottle opener, lid pryer, bit driver, and ruler, for starters.