Walmart offers the Pyrex 8-Piece 1-Cup Round Food Storage Set, model no. 1085655, for $9.97. Choose Site-to-Store pickup to avoid the $4.97 shipping charge. (Amazon charges the same for Prime members.) That's $7 under the lowest shipped price we could find. The set includes four 1-cup glass containers with BPA-free lids.
Kmart offers a selection of Pyrex measuring cups, with prices from $3.14 as listed below. Opt for free in-store pickup to avoid the $5.75 shipping fee. That's the lowest total price we could find by at least a buck and as much as $7. The deals:
Available in-store only, Target offers the Pyrex 7-Cup No-Leak Round Storage Dish for $6.36. (It's not available online.) That's $6 under the lowest price we could find for a shipped unit sold elsewhere. This dish features a no-leak lid made of glass and silicone.