Part of the very popular Pipedream Icicles range, the Valentine Heart anal plug is great for temperature play. Just run the wand under warm water or place it in the microwave for a few seconds to heat things up. Chill it under cold water or put it in the freezer for a cool sensation.
Clean up is a snap. Use Toy Cleaner and warm water, or put it in the dishwasher for a worry-free wash after the fun.