Banana Bags Grab a Bunch. Oversized storage bags seal up those big objects you used to cover with several smaller bags or tried to tie a tarp over. With Banana Bags you put that bulky object in the bag, seal it with the extra long twist tie provided, and forget it. It is sealed against moisture, dust, bugs, and spiders. Tough 2 mil plastic is see-through to show contents and heavy-weight to resist tears and punctures. Protects items during moving.