Very good device. They fit very well on bowls and protect food from interaction with air. I have some experiences with this brand (Walfos) and all the items that I have bought from them are very nice and durable.
Online store: AliExpress
US $4.33 30% OFF|6pcs Reusable silicon stretch lids universal lid Silicone food wrap bowl pot lid silicone cover pan cooking Kitchen Stoppers-in Cookware Lids from Home & Garden on AliExpress - 11.11_Double 11_Singles' Day
5.08 USD