What are the dimensions of the 40 oz? Specifically the width, I'm interested in knowing if this will fit in my car cupholder...

The 40 oz and 32 oz bottles do not fit inside standard cup holders, but does fit in larger cup holders. The 22 oz and 18 oz bottles fit in all standard size cup holders. Please see dimensions below: 18oz bottle Weight(cap not included): 255g Height(cap not included)： 198mm Outside diameter of bottom: 74mm Outside diameter of top mouth: 58mm Capacity: 550ml carton size: 57*39*29cm Unit Per Case: 24PCS color box size: 92*92*270mm Weight: 10.9kg 22 oz bottle Weight(cap not included): 325g Height(cap not included)： 238mm Outside diameter of bottom: 74mm Outside diameter of top mouth: 58mm Capacity: 650ml 32 oz bottle Weight(cap not included): 368g Height(cap not included)： 228mm Outside diameter of bottom: 91mm Outside diameter of top mouth: 58mm Capacity: 946ml 40oz bottle Weight(cap not included): 420g Height(cap not included)： 265mm Outside diameter of bottom: 91mm Outside diameter of top mouth: 58mm Capacity: 1000ml

Is this dishwasher safe?

They say it isn't but I've been putting mind in the dishwasher almost every day for months now and it seems fine. I do think it's possible that if the dishwasher gets very hot in the dry cycle that it might warp the cap. However, I can't really see how else to clean this bottle. The opening isn't wide enough to get my hand in there so, dishwasher it is.

can you put hydro cell water bottle in dishwasher?

As quoted from Hydro Cell's website: "We recommend washing your Hydro Cell with warm soapy water and bottle brush... We recommend washing your Hydro Cell accessories with warm soapy water. Dishwashers can retard accessories and make them unusable over time."