Today only, until 5 pm ET (or 100% claimed), Amazon offers Amazon Prime members the Pyrex Deluxe 10-Piece Glass Food Storage Set, model no. 6021224, for $10.99 with free shipping. (Non-members can spend $25 or more to get free shipping; otherwise it adds $9.12.) That's $4 under our December mention and the best we've seen. This set includes two 2-cup round containers, a 3-1/2-cup rectangular container, 4-cup round container, and 6-cup rectangular container, all with lids.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)