Tupperware Aquasafe Water Bottles 500ml-set Of 2 Rs. 209 Rs 309 and get Rs 100 off with coupon SHOP100 It has textured surface making it non slippery.It has a classic round seal thereby making it airtight and liquid tight.It saves space due to easy stackability.It has sheer base which allows easy identification of content.It has a tab for ease of opening. http://shopping.rediff.com/product/tupperware-aquasafe-water-bottles---500ml-set-of-2/11546740