If you figured out how much was contained in 1 ml and poured out your dosage you could evaporate to leave methamphetamine powder and lemonade residue.
It probably wouldn't scrape up into a powder it would be quite sticky.
But you could with gentle heat take up the methamphetamine contained in this sticky mess into a ml or so of water. If you filtered this with a 0.2 micron filter it would be relatively safe to inject once or twice, but I wouldn't make a habit of it.
It certainly would be safer than just filling your rig from the bottle and shooting it into you!! If you do that at least heat the lemonade a bit to make sure the CO2 bubbles are all gone as another poster pointed out.
It has been done before but you could make yourself very ill. Just drink it.
If you are intent on injecting it please do as I outlined before and use a 0.2 micron filter to remove any bacteria.