Premium Quality Equipped with a non-toxic, BPA-free hermetic seal. They withstand extreme temperatures (-40C + 230C). High Stretch Perfect for 3 "-10" containers and can be pulled up to a maximum of 30% of the lid size. Fits all shapes of containers. Eg, Round, rectangle, square shapes, plates, dishes, bowls, jars, containers, jars, cans, cups and glasses. Good waterproofingSilicone stretch lid can completely cover its mug, Fully insulated of air to enter, to achieve the best preservation effect. Note: For better waterproofness, keep the stretch silicone cover when in use. Eco-friendly and economical The extra thick silicone is durable and will not tear or deform. Help keep food and drinks fresh like new. Multi SizeGame storage contains sizes: 6.5cm, 9.5cm, 11.5cm, 14.5cm, 16.5cm, 21.0cm, which can cover containers of various shapes and sizes.