The Thermulate Tumbler 0.9L is ideal for keeping drinks at the perfect temperature throughout the day. The double-walled design provides excellent heat retention to keep drinks cold for up to 12 hours and warm for up to 6. The durable stainless steel construction ensures lasting performance and the flip-top straw lid adds simple, on-the-go convenience. Finished with a spill-proof design it's a reliable everyday essential.