... Or will do at some point before moving into a single bed?
We currently have this John Lewis Eric cot, which is smaller than a standard cot, and a single bed which we imagine DS will go into around 2.5/3, which we use as a guest bed as it turns into a double. We didn't buy a cotbed because we needed a space saving cot at the time, and now we have this single for him the future.
Anyway, he did a major poo this morning that ended up on his mattress, so I want to buy a new mattress but not if he's going to need a bigger cot at some point soon - if that's the case, we'll just buy the bigger cot now.
Due to room shape it's going to be a nightmare trying to fit a bigger cot in, so wanted to canvas opinions. He's only 12 months and I've been wondering if he looks a bit cramped already? But actually now having taken the picture I don't think he looks too bad. But will it last him til he's big enough for a single (with side guard thing)? When is that anyway? So many questions!! 
WWYD?