Realistic Dildo

Looking to surprise my wife with a realistic dildo.

I want to blindfold her and go out the room and come in with it and use it on her.

I was going to put it in a bowl of warm water as i heard this makes it feel more real is this true.

and do you have any tips on the first ones to buy as never done it before.

obivously i wanna go as huge as you can go but i am aware that this might not be realistic.