Tupperware Silicone Stand-Up Bag Set Oven Microwave Freezer Safe Set Of 4 New

Handy slot: Designed for hands-free carrying, a simple carabiner can hook the bags onto a rucksack or belt. High-grade silicone material: Temperature approved from -13°F/-25°C to 425°F/220°C making these reusable bags great to use from the freezer to microwave and oven.

eBay