ENCEEN 300Pcs Plastic Seal Bags Clear Resealable Grip Bags Self Lock Plastic Storage Bag Pouches, Big Medium & Mini Sizes(14 x 20cm, 9 x 13cm, 6 x 9cm)

Just what I wanted - in this case to secure and protect my camcorder batteries, on a trip to the Philippines

Came with 3 handy sizes as same exactly as the pics. The zip worked great after I tried 3 sizes randomly. Thank you!