Good morning clean, cool water from a stainless steel sippy cup.
The 12 oz. Klean Kanteen water bottle with optional adapter takes regular Avent sippy spouts. It looks like most places sell it for about $16, which includes a 12 oz. toxin-free and non-leaching, durable, ultralight, dishwasher-safe, electropolished #304 stainless steel bottle coupled with a non-leaching #5 polypropylene adaptor and two (2) #5 polypropylene Avent sippy spouts. It uses materials which don't contain Bisphenol-A, which is thought to disrupt hormones, but is in pretty much every other plastic thing your kid chews on. All caps and lids fit all sizes of Klean Kanteens, so when the kid outgrows the sippy, swap a regular sports bottle cap or stainless steel flat cap. It's got a lame logo, but that should come off with a little metal polish. Klean Kanteen will also do private label branding of their bottles—minimum order for custom labeling with your own logo: 160 units.