The unit comes w/ a red plastic tab that inserts on the back-end (when the claw is pressed closed) keeping it closed. The mfr’ing cost of that tab is probably under 1¢, but I’d have no idea how/where to buy one if I wanted it.
For 25¢ (+ tax), this is a deal just for that plastic tab.
BTW, the product page states “Item not available in stores” (so doesn’t let you choose store pickup at that point), but once in your shopping cart, it allows you to change from delivery (which charges $9.95 S&H unless you load up your cart w/ $49.99+ worth of items) to store pickup (which includes FREE S&H).