In life, as in fantasy, pleasure, pain, and desire co-exist. It is natural to seek to maximize pleasure at every opportunity.
Pyrex glass sex toys such as these are works of art, a joy to behold, but especially to use, for both you and your partner.
You deserve the indulgence. Take care of them and they will become a permanent part of your collection of joy toys. Glass, unlike rubber and most plastics, will not deteriorate when used properly, and will not degrade when used with the lubricant of your choice.