Rakuten.com Shopping has the Lock & Lock LLG821S4 8-Piece Boroseal II Glass Storage Set for $15 with free shipping. Features heat-resistant glass construction for use in microwave and oven, resistant to sudden temperature changes, 4-side airtight locking system, and is stain and odor resistant. Normally $21.
Oh no, the borosilicate glass arguer guys will be here making comments soon...