This is the second set of these i have purchased as I love them that much... they’re so handy and so practical and so easy to use!! They come in all different sizes ... the smallest is perfect for a can of say dog food which is what I use it for and the largest will fit a large bowl...super flexible silicone covers that are clear and super quality means they can take some stretching with no possibility of ripping... you simply stretch it cover your food or whatever you choose to cover... the seal is air tight and they can be pulled down for the perfect fit.. they keep food fresh until you Next need it and stops the use of expensive cling film and foil... just pull off to remove and wash... ready for the next time ... so easy to store when not in use as they just all collapse into each other