The daily deal site Deal Genius has a nice discount today on this popular Thermos Cold FUNtainer bottles.
These are great straw “sippy” cups. A speech therapist who worked with one of my kiddos recommended these for him when he was a toddler. She told me that straw sippies are much better for their oral development than the tip-and-sip kind — so we always tried to use these! (Not that I’m a ST, or play one on the Internet, just passing on what she taught me!)