I just got a few S. Flava and S. Purpurea today. The Purpurea looks incredible. The Flava looks OK too but some of the pitchers have thick brown rings on their necks. Some are even brown spots that looks like they've rotten through. Is this just signs of shipping stress or something more serious? Not all the pitchers have this... quite a few look very healthy. I have both in a mix of 50/50 peat/perlite. Also to note, and I'm a bit embarrassed to admit this, but I was short on pots and potted the Purpurea in a 2-Liter bottle cut in half with holes melted in for drainage. Can I leave it be or would it be a good idea to repot to something more sturdy? I'm begininng to like these more than my VFTs (just a bit more). Thanks in advance.