Lids pop off as soon as you push them down. Can't use the lids at all

The glass is very durable and thick. The rubber on the lid keeps it leak-proof so even if you accidentally tip it over (unlikely because cup is very heavy) nothing will leak. The main reason I gave it 3 stars is because the straw has a VERY strong metallic taste. It doesn't come with a cleaning brush so you cannot clean the inside of the straw thoroughly. A bit worried about what the straw is made of and whether it is safe to drink with. The wooden lid also chipped very easily from the first time of using it.

Perfect for my iced coffee. Only had it a few days so can’t attest to the durability of it yet, but the glass is nice and thick.