I find most Gardeners and Plant Lovers to be very sharing, very giving. They have snippers in hand ready to cut off a tip to share, harvest seeds, or dig up plant babies to pass around. Identifying little cuttings as they grow into big plants is difficult sometimes because the ID tags wear off, the Ink washes off or gets rubbed off or the tags simply get lost. While this idea won't help you from losing your plant ID tags, this will help you keep the identity of your precious growing plant start for a long time.
All you need are some empty, washed aluminum cans, a pair of scissors and a ball point pen.