Here's what other sites are saying:
Brisk mornings on the trail call for the completely convenient Stanley Clip Grip Mug. This handy mug features a Clip Grip on the handle and a leak-proof lid so you can slowly sip your coffee and clip it to your backpack when you aren't drinking it. The double wall insulation keeps your drink piping hot for a few hours, and it prevents the durable stainless steel outer wall from burning your hands.
Stanley Outdoor Mug w/Clip Grip 16 oz.
Stanley Outdoor Mug w/Clip Grip 16oz.
Stanley Classic Mug 18oz.
Stanley eCycle Camp Mug
Snow Peak Ti-Double 450 Cup
$45 - $49
GSI Outdoors Gourmet Nesting Mug and Bowl
$6 - $7
GSI Outdoors Infinity Stacking Cup
Snow Peak Ti-Single 450 Cup
$27 - $29