Stretchers!
This set is your new alternative to plastic wrap. They create a complete airtight seal around bowls, cups etc to help keep your food fresh. As they are made from silicone, the general bonuses apply, such as, they can withstand temperatures from freezing up to 250C, and they don't contain BPA or leach any nasty chemicals! You can definitely get creative with these guys, from sealing liquids, to using them as baking paper, they have many uses and remain very strong.
There are three sizes included in this set:
-10cm x 10cm
-14.5cm x 14.5cm
-19cm x 19cm