That only applies for something very big (and a hole in the ground breaks the surface of the ground). If that hole were in, say, a wall, you’d call it a dent. You’d also call it a dent, rather than a hole, if it didn’t actually cut into the ground. At least, I would.
Topologically there is no hole, it would be a solid sheet of plastic folded in on itself. Even one hole assumes that it was intended to be a solid cylinder (i.e. a solid rod of plastic is bored through to create the straw).
Two holes assumes that it was meant to be a hollow “bag”. Although I’ve never been to a straw manufacturing facility, my guess is that they are extruded in a hollow cylinder; no holes.
A while ago I was talking to my Mom about a visit she had recently made to the town I grew up in (which neither of us live in any more). She was telling me about some buildings downtown and how they had changed since we had been there. I listened to her description and agreed with her that “yeah, it must have used to been different”.