Review on ☕️ Enhanced Focus and Caffeine Kick: Scientific Glass Caffeine Beaker Mug (400mL) by Patrick Lets

UPDATE: SAFETY HAZARD When I first used it, I put in room temperature liquid and 3 ice cubes. He thermally collapsed 1 minute after drinking. I almost swallowed a piece. THIS IS NOT SAFE TO USE. I will get it in the next review. This is a very smart gift, but I'm wondering if it would be safe to use with a drink over 150 degrees Fahrenheit. The glass is very thin making me think it's very fragile and I'm afraid it will break. In addition, only two or three fingers can be inserted into the pen, and ml is inaccurate. I'm seriously discussing reverting this as I think it's a security issue. Sincerely, a real chemist.