These tumblers are 40oz and double walled for hot and cold beverages.   It comes with a long plastic straw.  The lid screws in and can rotate from drinking from the straw, to sipping, to closed to help with splashes while walking.  It is not completely leak proof, but having it close does help with splashes.  It also fits in cup holders!  Keeps ice cold for several hours or use for hot beverages too! These tumblers are sublimated using the highest quality inks.  No vinyl stickers or epoxy used on them. Handwash for longevity.  No microwave since it's stainless steel.