Not sure why I can't post a picture here but these are a new product I came up with a while ago and wanted to share.
These are for your 1000ml and 2000ml small mouth Erlenmeyer flasks.
These are designed to help block out the light, help maintain constant temps from sitting on your counter and helps protect them from getting broken if they accidentally get hit. I have been using these for a while now and love them.
For all you here at HBT I am going to ship these free (USA only) to the first 20 people that buy 2 or more.
Respond to this thread and I will PM you a promo code.