... spill, one time using,smart caps... 5 gallon bottle cap ,non spill cap .water capMaterial /features:1. All new food ... 5 gallon water bottle caps ,include cap ,inner plug,can print LOG ,use with heat sticker or foam or not9. ... packaging use. 8. The inner cap opens smoothly an securely when the bottle removed from the cooler ,which particles ... material, and good sealing performance ! 5 gallon bottle cap