Ideal for food storage, meal prepping, freezing leftovers and packing lunch in a convenient, safe and hygienic way. The easy-open valve on the clip lid keeps these containers airtight and microwave friendly.5 ( l ) x 13 ( w ) x 6.5 ( h ) cm800mllid: BPA free • PPbase: tempered glassmicrowave-safe • please open adjustable lid valvea dishwasher is not recommended for this item in order to maintain the seal in the lid