Sippy Spouts & Adapter for Klean Kanteen Classic Sippy
For the wee ones, Klean Kanteen's adapters and Sippy Spouts from Avent convert any Klean Kanteen Classic into a spill-proof, BPA-free, toddler-friendly Kanteen.
Kid-friendly design
Interchangeable with all Kanteen Classic bottle sizes
One thing I love is you can convert any classic KK to a sippy cup. The standard is 12 oz ; however, if your toddler is a big drinker with strong arms, 18oz works too. The weirdest thing is there is a gym in Toronto that sells this adapter for their runners. Looks like the sports cap flow was not enough so everyone uses the sippy spout. The functionality is there but I cannot help smiling seeing grown man using it. Well their argument is that they are confident and comfortable with their manhood.