The item you're referring to is most likely the Stanley Quencher H2.0 FlowState™ Tumbler in the $1.2\text{L}$ (approximately 40 oz) size, which comes in a wide variety of colors, hence the "Multicolor" designation.

Stanley is famous for its durable, vacuum-insulated products, and this tumbler is a very popular option for daily hydration.

Key Features of the Stanley Quencher $1.2\text{L}$ TumblerFeatureDetailCapacity$1200\text{mls}$ ($1.2\text{L}$ or 40 oz)InsulationDouble-Wall Vacuum Insulation—designed to keep drinks hot, cold, or iced for hours.MaterialDurable, rust-proof $18/8$ Stainless Steel (often made with $90\%$ recycled stainless steel) and BPA-free.Temperature RetentionKeeps liquids Cold for $11$ hours, or Iced for up to $2$ days. (Performance for hot drinks is also excellent, typically around $7$ hours).LidFlowState™ $3$-Position Lid with a rotating cover that allows for three settings: 1) a straw opening, 2) a drink opening, and 3) a full-cover top.HandleComfort-Grip Handle for easy carrying.BaseNarrow Base that is compatible with most car cup holders.CleaningDishwasher safe for easy cleaning.ColorsAvailable in numerous colors and finishes (Multicolor refers to the large selection of available options).

This large-capacity tumbler is designed for all-day use, minimizing the need for constant refills, and is a popular choice for commuting, workouts, and travel.1