From the bottom of the Meniscus!!!

"This is a set of three volumetric flasks with glass stoppers. The two larger flasks are made by Pyrex, and hold 250 mL. The smaller flask is marked with a "D" in a diamond shape, and holds 100 mL. All three were made in the USA. They are in very good condition, with no chips and no cracks. These would make great bud vases.

(Please note that these flasks were used in a lab in the 1970s, so they should not be used for food or drink.)

Size: large about 9", small about 7.5""

 Found at VioletQVintage's Etsy shop.