Ideal for drinking cold water with ice, the 21 OZ STANDARD MOUTH FLEX from Hydroflask is a standard opening insulated bottle.

Made of professional grade stainless steel, this insulated model has a wide opening for easy filling. Designed to meet the same high quality standards as other Hydro Flask products, this bottle offers great hydration with TempShield thermal insulation that reduces condensation and keeps drinks cool for 24 hours or warm for 12 hours.

This model is equipped with the Flex Cap insulation.