For restaurants and retail, these Square Bulk Containers make the perfect storage container. These microwaveable storage containers can withstand temperatures of up to 70 degrees because they are made of sturdy, recyclable PP plastic. Tamper-proof lids (sold separately) ensure that the security tab must be broken in order to remove the lid, but they can also be resealed if necessary (not the security tab). Ideal for preserving freshness and protecting food and spices from contamination. There are two sizes offered; lids are sold separately.