This fun water bottle holder for a 30/40 oz Stanley Tumbler is perfect for keeping hydrated on the go. With its bright yellow color and smiley face print, it's sure to bring a smile wherever you take it. The insulated bag has enough room for standard sized water bottles up to 40 ounces, helping keep drinks cool for hours. An adjustable shoulder strap allows comfortable carrying no matter who's using it. The durable fabric construction stands up to everyday use, and the zipper closure keeps contents secure. Kids and adults alike will enjoy toting their water bottle in this cute bag, ready to quench their thirst throughout long days at school, work or play.