After adding the contract in the app, you will receive a link to the form to order equipment or add a photo of any thermal bag you already have. A refundable deposit of PLN 150 is entered in the Wolt application for the equipment. The deposit is added to your balance in the Wolt app. You "replenish" it by making the first deliveries, and at the end of cooperation - Wolt will return it to you.
Wolt allows you to use any thermal bag.
More information - https://partnerswolt.pl/gear