5 gallon water bottle cap with inner foam Blue or white Diamater:56mm,complies with ... 5 gallon water bottle cap(two pieces) with inner foam 2.Blue or white, PE new plastic material,food ... inside, the color and luster is well-balanced, feel smooth, no smell, no blowout, leakage-proof 4.Applicable to ... four-in-one, recycle or one-way,with inner foam and heat sticker or not,you could choose what ...