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Walmart has Mossy Oak 30 oz. insulated tumblers on clearance for $ 5. Not at all Walmarts but 2 of 4 I visited had them and had quite a few. Saw some colors, red and green, but mostly stainless steel silver. Similar in construction and performance (according to reviews on Amazon) to Yeti and Ozark Trail.

Features (according to label):

18/8 Stainless Steel, double-wall, vacuum-sealed construction
Keeps drinks hot 4 hours, cold 8 hours
Cupholder friendly (most cupholders)
BPA free
Durable, threadless Tritan ™ lid easily slides open and closed for one-handed drinking