Snake-in-the-glass shows just how venomous reptiles can sneak into homes

Keeping your doors and windows shut is no proof against keeping out a snake looking for a comfortable place to curl up - and here's the proof.

Snake Catchers Adelaide has posted a photo online of a standard-sized wine glass with a red-bellied black snake "almost a metre long" snuggled in its bowl.

And it doesn't even fill the glass.

Ange, from Snake Catchers Adelaide, told 9Pickle that not only was the snake happy to slide into the glass, but it "didn't want to get out".

"People have trouble understanding how small a space a snake can get into," she said.

She said with a hot summer around the corner, people should be aware that snakes would be looking for a cool place to hibernate during the day before emerging to feed at night.

And they love small, confined spaces they can snuggle into.

That, coupled with the slightly unsettling fact that snakes can almost completely flatten themselves out to squeeze beneath a door, means people should be wary of what the confined spaces in their house could be hiding.

And remember, if you find a snake at home, don't try wrangling it yourself - even if it is sitting in your favourite wine glass.