I have always been a big fan of Klean Kanteen and use the 16oz stainless steel pint cup on a daily basis. Everyone in our household is now using one with the GreenPaxx silicone lid and silicone straw. The fit is perfect! The lid stays on tight and the silicone straw is wide enough to drink smoothies or summer time milkshakes out of, no problem. What I really like is how light weight the Klean Kanteen stainless steel cup is. It cup only weighs 3oz!
A stainless steel cup + silicone lid and straw = no plastic