Curv'e'keepa Plastic Tank Mini. Curv 'E' Keepas come in five sizes with assorted coloured lids. These quality bow-fronted plastic tanks have secure fitting lids with clear opening tops, and are perfect homes for frogs to fish and reptiles to insects. The two smaller sizes also come with built-in carrying handles. 17.8 x 11.4 x 14cm. 1.9 Litre capacity.