Come and see our amazing products. Each mason jar mug comes with a metal lid with a hole for the included metal straws. The mason jar lids securely thread onto the glass mugs for a spill-proof and mess-free experience.This set is dishwasher safe and comes with a specialized brush for cleaning the metal straws. The mason jar cup is made of glass that is freezer and microwave safe (the metal straw and lids are not microwavable). Pls confirm with us about the packing info, stock color and exact production time before placing your order.