TAL’s Ultra Bottle features a unique self-cleaning design to purify your water instantly. Simply push to activate the UV-C LED light and eliminate microorganisms. This multi-pack of four is perfect for sharing with the whole family. Pack of 4 Ultra bottles  Purifies your water with the push of a button Promotes healthy hydration habits Antimicrobial exterior finish prevents microbe growth on surface Double-wall insulated stainless steel Keeps drinks cold for up to 24 hours Reusable design reduces plastic waste Care & Use: Hand wash only.