This is a super cool bottle for making yeast starter wort. Mix DME and water to make your wort and then boil in the microwave with the cap off. Remove from microwave, thread on the cap while still hot, and place in refrigerator. Store the wort till you need it.  When you are ready to make a starter remove from refrigerator to warm up, pour into a sanitized flask, and add your yeast. Make multiple bottles all at once at store in your refrigerator until needed. 

This reagent bottle is made from durable borosilicate perfect for storing anything you need. Borosilicate is great because unlike ordinary glass it won't crack with rapid changes in temperature.