Review on 24 Oz IRON °FLASK Classic Tumbler - Vacuum Insulated Stainless Steel, Hot Cold, Double Walled Thermo Travel Mug, Water Metal Canteen by Kristina Scott

I really liked this glass at first. Even if it sometimes drips a bit from the top when filled to the fill line (and not over) when I tilt it towards me to drink from a (curved) straw, it was still very nice; good capacity and i was able to leave it full of ice overnight and wake up to find the ice was still mostly intact with very little melting so the insulation was great. However, internal stains are easy. It's nothing when I was about to clean the lid and noticed mold and/or fungus growing between the glass of the lid and the rubber O-ring around it that I can't get to. to erase it. I clean it regularly with food sanitizer, so I don't know how long it took me to get past the critical threshold of actually seeing it. But it's a cup in the trash because ugh. I wasted my money.